Finding unknown angles in quadrilaterals

P5 Mathematics · Measurement & Geometry · 178 questions · difficulty D1–D5 · Singapore MOE-aligned

Sample questions

SAMPLE 1

In an isosceles trapezium, one base angle is 70°. What is the other base angle on the same base?

SAMPLE 2

An isosceles trapezium has a base angle of 60°. Find the other base angle on the same base.

SAMPLE 3

Three angles of a quadrilateral are 150°, 30°, and 60°. What is the fourth angle?

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