Question

In triangle below, angle p is a right angle. Suppose that m angle q =(3x+25) and m angle r = (4x+30).

(A) write an equation to find x. Make sure you use an “=“ sign in your answer.

(B) find the degree measure of each angle.

Answer 1

(A) To find x, we can use the fact that the measures of the angles in a triangle must add up to 180 degrees. So we can write an equation using that information and the measures of angles q and r:

m angle q + m angle r + 90 = 180

(3x+25) + (4x+30) + 90 = 180

so:

7x+45 = 90

7x = 45

x = 45/7 = 5

(B) To find the degree measure of each angle, we can substitute x = 5 back into the expressions for angles q and r.

m angle q = (3x+25) = (3*5+25) = 40 degrees

m angle r = (4x+30) = (4*5+30) = 50 degrees

Since the angle p is a right angle, it has a degree measure of 90 degrees.

So the angle measures are: angle q = 40 degrees, angle r = 50 degrees, angle p = 90 degrees.