Question

100 POINTS
Quadrilateral ABCD has the following angle measures:

m∠A = 112°, m∠B = 130°, m∠C = ?°, m∠D = 90°

What is m∠C?

Answer 1

Answer:

• m∠C = 28°

Step-by-step explanation:

Interior angles of the quadrilateral sum to 360°:

• m∠A + m∠B + m∠C + m∠D = 360
• 112 + 130 + m∠C + 90 = 360
• m∠C + 332 = 360
• m∠C = 360 - 332
• m∠C = 28