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DedPeter [7]
3 years ago
13

What is the measure of ∠ADC in quadrilateral ABCD?

Mathematics
2 answers:
Andreyy893 years ago
4 0

we know that

The quadrilateral ABCD is a isosceles trapezoid. The properties of the isosceles trapezoid are as follows:

-The lower base angles are congruent.



So

m∠A=m∠D

m∠B=m∠C

m∠A+m∠B=180°

m∠D+m∠C=180°

therefore

m∠D=m∠A=115°

m∠B=180-m∠A

m∠B=180-115

m∠B=65°

m∠C=m∠B=65°

<u>the answer is</u>

The measure of angle ADC is 115°

Tcecarenko [31]3 years ago
3 0
115 is the correct answer
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