Siti draws a 6-sided shape on square grid paper. The shape has 3 right angles and 2 angles that are larger than a right angle. How many of the shape's angles are smaller than a right angle?
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Worked Solution
The shape has 6 angles in total.
3 angles are right angles.
2 angles are larger than a right angle (obtuse).
Let the remaining angles be smaller than a right angle (acute).
6 − 3 − 2 = 1.
So 1 angle is smaller than a right angle.
Correct answer: 1
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