Tutors Answer Your Questions about Geometry proofs (FREE)
Question 511217: Given:
Angle 1 and Angle 2 are complementary.
Angle 2 and Angle 3 are supplementary.
Prove: Angle 1 and Angle 3 are congruent.
Is this possible or is this an error in the question? If both sets were complementary or supplementary, the proof is straight forward. But with one set complementary and the other supplementary, how can Angle 1 and Angle 3 have the same measure?
Click here to see answer by solver91311(24713)   |
Question 511217: Given:
Angle 1 and Angle 2 are complementary.
Angle 2 and Angle 3 are supplementary.
Prove: Angle 1 and Angle 3 are congruent.
Is this possible or is this an error in the question? If both sets were complementary or supplementary, the proof is straight forward. But with one set complementary and the other supplementary, how can Angle 1 and Angle 3 have the same measure?
Click here to see answer by richard1234(7193)  |
Question 511603: Give an argument for the statement, including a reason for each step.
If angle 1 and angle 2 are right angles, then they are supplementary.
This is my answer but I don't think it's correct:
Angle 1 and Angle 2 are right angles. (given)
Angle 1= 90 Angle 2= 90 (definition of right angles)
90+90= 180 (definition of supplementary angles)
Please help me. Thanks!
Click here to see answer by richard1234(7193) |
Question 512025: Some facts about the maximum banking angles of Daytona International Speedway at corners 1,2,3, and 4 are below. Find angle 3. Explain your steps.
Facts:
Angle 1 + Angle 3 + Angle 4= 93
Angle 2 + Angle 4=62
Angle 2=Angle 3
Angle 1=Angle2
Please help me. I'm so confused and I don't know where to start.
Click here to see answer by richard1234(7193) |
Question 512185: Determine whether each statement is always, sometimes, or never true. Explain your reasoning.
1. Three collinear points determine a plane.
-I Put "Never, 3 noncollinear points make a plane." Is that right?
2. Two points A and B determine a line.
-I put "sometimes, it depends where the points are located." Is that right?
3. A plane contains at least 3 lines.
-Always. (I'm not sure why though) Is this right?
Click here to see answer by richard1234(7193) |
Question 515067: Graph each set of lines. then: A. identify two congruent triangles that are formed by the lines. b. write a paragraph proof to justify your statement in part A.
1) y=5 y=-x+1
y=-4 y=-3x+2 {grid is here}
A.______________________________________________________
B.______________________________________________________
Click here to see answer by Alan3354(69443)  |
Question 516400: I am in Honors Geometry and we are dôing proofs, oh no. Here is the problem we need to solve:
Given line AB is perpendicular to line BC and angle 2 and angle three are complimentary angles, prove angle one is congruent to angle three. The picture shows a triangle with a right angle and a line (not a bisector going through it). Thank you very much, I appreciate any help.
Click here to see answer by richard1234(7193) |
Question 516671: : Provide the reasons for the proof.
Given: m angle 1 = m angle 2
Prove: (line over)AC(up-side down T)(line over)BD
Statements:
a. m angle 1 = m angle 2
b. Angle 1 is supplementary to angle 2
c. m angle 1 + m angle 2= 180 degrees
d. m angle 1 + m angle 2 +180 degrees
2(m angle 1)= 180 degrees
e. m angle 1 = 90 degrees
f. angle 1 is a right angle
g. .:.(line over)AC(up-side down T)(line over)BD
Reasons:
a. given
b. ?
c. ?
d. ?
e. ?
f. ?
g. ?
Click here to see answer by richard1234(7193) |
Question 516939: How do i solve this proof?
I will attach a picture to this so you can open it and see what i'm talking about.
I am so confused i know it's a postulate, but i don't know where to start
http://tinypic.com/r/33v2maq/7
THANKS IN ADVANCE.
Click here to see answer by Edwin McCravy(20081)  |
Question 517366: GIVEN:
triangle ABC has vertices A(2,1) B(7,4) and C(4,-1)
triangle DEF has vertices D(-3,1) E(0,-4) and F(-5,-1)
PROVE:
triangle ABC is congruent to triangle DEF
(it is a 7 step proof)
I understand that I need to utilize the distance formula to prove corresponding sides congruent, then use the SSS (side side side) postulate to prove the triangles congruent, but I do not understand how to fit this into seven steps. I also don't know whether to use properties of equality or not to justify my equations, but that would make the proof far too long.
-thanks for the help.
Click here to see answer by solver91311(24713) |
Question 519318: my teacher gave us an extra credit question which was:
given: A=B
prove: B=26
he did half of it like this
1. A=b 1. given
2. a*a=b*a 2. multiplication postulate of equality
a^2=ba
3. a^2-b^2=ba-b^2 3.multiplication postulate of equality.
(a+b)(a-b)/(a-b)=b(a-b)/(a-b)
4.(a+b)=b
5. b+b=b
the extra credit is to tell him what he did wrong and why?
Click here to see answer by Edwin McCravy(20081) |
Question 519333: Hi. Is there any trick to doing proofs or do you just have to memorize the different postualtes and theorems. I have a test on them on monday and I am confused. Also, how do you know which step you are supposed to write next.
Click here to see answer by richard1234(7193) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825
|
