The angles of a quadrilateral ABCD are A = 30˚, B=60˚, C=75˚.What is the measure of∠ D.State whether the quadrilateral is concave or convex? (
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Answered by
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The sum of angles in a quadrilateral = 360⁰
sum of the given three angles = 30⁰+60⁰ + 75⁰
= 165 ⁰
therefore , the fourth angle = 360⁰- 165⁰
195
therefore, the fourth angle ∠D = 195⁰
sum of the given three angles = 30⁰+60⁰ + 75⁰
= 165 ⁰
therefore , the fourth angle = 360⁰- 165⁰
195
therefore, the fourth angle ∠D = 195⁰
Anonymous:
how can we identify whether a quadrilateral is either concave or convex??
Answered by
0
Answer:
<D = 195°
and the quadrilateral is concave. as i know.
hope its help you .
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