Unit 5 · Class 8 IB MYP · MCQ Test
Geometric Properties MCQ Test — Class 8 IB MYP
Practice 10 multiple-choice questions with instant answer reveal and explanations.
Geometric Properties — MCQ Questions
1What is the sum of interior angles of a triangle?
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Answer: 180°
Hint: This is a fundamental property of all triangles.
Solution:
The sum of interior angles in any triangle is 180°.
2What is the sum of interior angles of a quadrilateral?
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Answer: 360°
Hint: A quadrilateral can be split into two triangles.
Solution:
Sum = \((4-2) \times 180° = 360°\).
3Two angles on a straight line add up to?
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Answer: 180°
Hint: A straight line forms a straight angle.
Solution:
Angles on a straight line are supplementary and sum to 180°.
4Vertically opposite angles are:
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Answer: Equal
Hint: When two lines cross, they form two pairs of equal angles.
Solution:
Vertically opposite angles are always equal.
5If one angle of a triangle is 90° and another is 40°, what is the third angle?
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Answer: 50°
Hint: Angles in a triangle sum to 180°.
Solution:
Third angle: — 180° - 90° - 40° = 50°
6What is the sum of exterior angles of any convex polygon?
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Answer: 360°
Hint: This is the same for all convex polygons, regardless of the number of sides.
Solution:
The sum of exterior angles of any convex polygon is always 360°.
7What is each interior angle of a regular hexagon?
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Answer: 120°
Hint: Sum of interior angles = (n-2) x 180°, then divide by n.
Solution:
Sum = \((6-2) \times 180° = 720°\). — \text{Each angle} = \frac{720°}{6} = 120°
8Alternate angles formed by parallel lines and a transversal are:
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Answer: Equal
Hint: Alternate angles are on opposite sides of the transversal, between the parallel lines.
Solution:
Alternate angles (Z-angles) are equal when formed by parallel lines.
9Co-interior (same-side interior) angles formed by parallel lines and a transversal add up to:
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Answer: 180°
Hint: Also called co-interior or allied angles.
Solution:
Co-interior angles are supplementary (sum to 180°).
10Corresponding angles formed by parallel lines and a transversal are:
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Answer: Equal
Hint: Corresponding angles are in the same position at each intersection.
Solution:
Corresponding angles (F-angles) are equal.
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Tips for Geometric Properties MCQs
- 1Read each question carefully and identify what is being asked before looking at the options.
- 2Try to solve the problem mentally or on paper first, then match your answer with the options.
- 3Use elimination — rule out clearly wrong options to improve your chances even when unsure.
- 4Check units, signs, and edge cases — these are common traps in Geometric Properties MCQs.
- 5Review your mistakes after completing the test to build lasting understanding.
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