clairemariecuen clairemariecuen

23-02-2018
Mathematics

contestada

A quadrilateral has angles that measure 74°, 93°, and 117°.

What is the measure of the fourth angle?

A.

76°

B.

104°

C.

106°

D.

284°
Please explain too!

Respuesta :

nicolina nicolina

23-02-2018

The answer is A. 76°.
The sum of the angles in a quadrilateral equals 360°.
Let the unknown angle be x.
The sum would be:
x+74°+93°+117°=360°
x+284°=360°
x=360°-284°
x=76°

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