After joining two pieces of a picture frame together a frame maker checks her work by measuring the diagonal. the sides of the frame form a right angle and the measurements are as follows: a=12in. and b=5in.

if the sides form a right angle, then the diagonal must be according to the Pythagorean Theorem:

If that is indeed the measurement, the frame maker knows she made the frame right-angled.

3201

step-by-step explanation:

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )