SOLUTION: Can you explain how to do these problems? thanks
19. the second angle of a triangle is two times as large as the first. The third angle is 10 more than the second angle. Find
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Question 121685: Can you explain how to do these problems? thanks
19. the second angle of a triangle is two times as large as the first. The third angle is 10 more than the second angle. Find the measure of the first angle.
20. The perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width.
thanks again
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
19. Let's call the angles A1, A2, A3.
1.
2.
From your triangle knowledge you also know that the sum of the angles of a triangle equals 180 degrees.
3.
Now substitute your values from equation 1 and 2 into equation 3.
3.
From 1,
1.
From 2,
2.
.
.
.
20. The perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width.
1.
2.
Substitute 2 into 1 and solve for W.
1.
From 2,
2.
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