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33 votes
33 votes
What must be the measure of

What must be the measure of-example-1
User Piotr Leniartek
by
2.5k points

2 Answers

27 votes
27 votes

Answer:

∠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°

User Mtmurdock
by
2.4k points
19 votes
19 votes

Answer:

∠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°

User Danny Sofftie
by
2.5k points