Question

What must be the measure of

Answer 1

∠D = 90°∠C = 80°

Explanation:

∠D = 90° (right angle)All right angles = 90°∠C = 80° (sum of all angles = 360°)110 + 80 + 90 + ∠C = 360°280 + ∠C = 360∠C = 80°

Answer 2

∠D = 90°

∠C = 80°

Explanation:

∠D = 90° (right angle)

All right angles = 90°

∠C = 80° (sum of all angles = 360°)

110 + 80 + 90 + ∠C = 360°

280 + ∠C = 360

∠C = 80°