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Tutors Answer Your Questions about Triangles (FREE)
Question 164928: A rectangular piece of cardboard with perimeter 30 in., two parallel and equally spaced creases are made. The cardboard is then folded to make a prism with open ends that are equilateral triangles. Find the volume of the prism as a function of x and what is the domain of V(x)? Thanks to those who can help!
Click here to see answer by ankor@dixie-net.com(6693)   |
Question 165224This question is from textbook Lets Review Math A
: QUESTION: In isosceles triangle ABC the ratio of the measure of vertex angle A to the measure of angle B is 2 to 5. Find angle C.
1st APPROACH: we know that in an isosceles triangle two angles are the same and the sides opposite them are also the same.
Since this problem doesn't tell you which is the base vertex in this isosceles triangle, I have assumed it to be 5x. Because of "RULE:"
the length of each side is less than the sum of the lengths of the other two sides and greater than the difference between these lengths....3less than x less than 7. Therefore x is in the range of 4, 5, 6.
2x+5x+5x=180
12x=180
x=15
Angle C is 75 degrees
2nd APPROACH: we know that in an isosceles triangle two angles are the same and the sides opposite them are also the same.
Since we already used 5x as the base vertex in our previous approach lets assume 2x is the base angle, this time, because it's an isosceles triangle.
2x+2x+5x=180
9x=180
x=20
Angle C is 40 degrees
BOOKS ANSWER IS 100 degrees, why?
This question is from textbook Lets Review Math A
Click here to see answer by jim_thompson5910(13794)  |
Question 165593: Hi, if theta is an acute angle and sin theta =1/2, then cos theta=
I have drawn a right triangle with the hypotenus on the right. It has a one on the bottom and a two on the hypotenuse. Then I tried 1^2+b^2=2^2 and ended up with square root of b^2 =square root of 3. I do not know where to go from there
Thankyou.
Click here to see answer by Earlsdon(4900) |
Question 168206This question is from textbook
: Please help me solve this: Find the formula for the area of an isosceles right triangle in terms of the hypotenuse?
all i know is that A=1/2bh... but i do not know what to do with it. Thank you in advance!This question is from textbook
Click here to see answer by Earlsdon(4900) |
Question 168324This question is from textbook Geometry
: I have triangle PQR. It is an isosceles triangle. Angles R and Q are congruent. Measure of segment PQ is the square root of x+3. Measure of segment PR is x+1. What does x equal and what is the measurement of PR?This question is from textbook Geometry
Click here to see answer by Mathtut(3670) |
Question 168336This question is from textbook Geometry
: I have triangle PQR. It is an isosceles triangle. Angles R and Q are congruent. Measure of segment PQ is the square root of x+3. Measure of segment PR is x+1. What does x equal and what is the measurement of PR?This question is from textbook Geometry
Click here to see answer by Mathtut(3670) |
Question 169639: The Question reads:
The folling figures are pairs of similar triangles with some dimensions given. Find the measure of the indicated sides.
(2 triangles, one is inside the other)
Bigger triangle is ACD
Smaller triangle is ABE (inside of ACD)
Angle ACD equal to 90 degrees
Angle ABE equal to 90 degrees
Segment AB is equal to 6
Segment AE is equal to 10
Segment CD is equal to 14
Find segment AC, BE, and AD
Click here to see answer by jojo14344(1483) |
Question 171590: hey!i am now taking geometry and i came across these questions can you help?
1.if two sides of a triangle 7" and 5",then the third side must be less than____? greater than____?
2.if the length of the median to the hypotenuse of a right triangle is 6 inches long, than the length of the hypotenuse is ____?
3.if a base angle of an isosceles triangle is 16 inches more than half of the measure of its vertex angle, than the vertex angle is ___?
please help thank you!!
Click here to see answer by josmiceli(3013) |
Question 171778This question is from textbook geometry
: Draw a triangle that satisfies each situation.
a. Two of the sides are altitudes.
b. The altitudes intersect outside the triangle.
c. The altitudes intersect inside the triangle.
d. The altitudes are also the medians of the triangle.
This question is from textbook geometry
Click here to see answer by Mathtut(3670) |
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