Advanced Mathematics Primary 3 Angles

A shape has 5 sides and exactly 3 right angles. Two of its angles are obtuse. What is this shape most likely to be?

A Triangle
B Rectangle
C Pentagon
D Hexagon
Show Worked Solution

Worked Solution

Step 1: Count the sides: the shape has 5 sides. Step 2: A 5-sided polygon is called a pentagon. Step 3: A pentagon can have varying angles — 3 right angles and 2 obtuse angles is possible for an irregular pentagon. The shape is most likely a Pentagon.

Correct answer: Pentagon

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