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Question

# Macy is dressed as a geometric shape for Halloween. She came up with a riddle to introduce herself to her friends. She says, "I am a plane figure with three sides, and the sum of two of my angles is 90°". What is Macy's costume?

A
A scalene triangle
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B
An isosceles triangle
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C
A right-angled triangle
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D
A square
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Solution

## The correct option is C A right-angled triangleTriangles are plane figures with three sides. The sum of two angles of the triangle is given to be 90°. Sum of two angles + Third angle = 180° Third angle = 90° Thus, Macy's costume is that of a right-angled triangle.

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