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Debora [2.8K]
3 years ago
15

Parallelogram A B C D is shown. Sides A B and D C are parallel, and sides A D and B C are parallel. Angle C is (3 y + 27) degree

s and angle A is (5 y minus 3) degrees. What is the measure of ∠A? ° What is the measure of ∠B? °
Mathematics
1 answer:
OlgaM077 [116]3 years ago
6 0

Answer:

Part a) m∠A=72°

Part b) m∠B=108°

Step-by-step explanation:

we know that

In a parallelogram opposite angles are congruent and consecutive angles are supplementary

so

In this problem

m∠A=m∠C

m∠A+m∠B=180°

step 1

Find the value of y

m∠A=m∠C

substitute the given values

(5y-3)\°=(3y+27)\°

solve for y

5y-3y=27+3

2y=30

y=15

step 2

Find the measure of angle A

m∠A=(5y-3)°

substitute the value of y

m∠A=(5(15)-3)=72°

step 3

Find the measure of angle B

m∠A+m∠B=180°

we have

m∠A=72°

substitute

72°+m∠B=180°

m∠B=180°-72°

m∠B=108°

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