Question

Quadrilateral ABCD has the following angle measures:

m∠A = ?°, m∠B = 97°, m∠C = 47°, m∠D = 90°

What is m∠A?

306°
234°
126°
54°

PLEASE HELP!

Answer 1

Answer: C) 126

Step-by-step explanation: first, you need to use this equation...

m∠A + m∠B + m∠C + m∠D = 360°

=> m∠A + 97° + 47° + 90° = 360° add all of the numbers...

=> m∠A + 234° = 360° subtract both sides by 234

=> m∠A = 360°- 234°

=> m∠A = 126°

Hope you've understood...

Answer 2

126

Explanation:

360-97-47-90=126

so 126