Grade 6 · Math · Unit 13 of 14
Angles, Area & Surface
Angle rules, area and surface area
What your child practises
Converting metric units, finding unknown angles, finding the area of trapezoids, rhombuses and L-shapes, and the surface area of boxes and pyramids.
Ontario Curriculum expectation: E2.1–E2.6 · metric conversions, angle relationships, areas of trapezoids and rhombuses, and surface area
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
A trapezoid has parallel sides of 10 cm and 12 cm and a height of 6 cm. What is its area in square centimetres?
(10 + 12) × 6 ÷ 2 = ?
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66
Hint: Area = (sum of the parallel sides) × height ÷ 2.
Question 2
Two angles are complementary. One angle is 61°. What is the other angle?
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29
Hint: Complementary angles add to 90°.
Question 3
An angle measures 100° clockwise. What is the same turn measured counterclockwise?
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260
Hint: A full turn is 360°. Counterclockwise = 360° − clockwise.
Question 4
A rhombus has diagonals of 10 cm and 5 cm. What is its area in square centimetres?
10 × 5 ÷ 2 = ?
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25
Hint: Area = diagonal × diagonal ÷ 2.
Question 5
730 cm = m
730 cm = m
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7.3
Hint: Divide by 100 to change cm to m.
Question 6
In a triangle, the interior angles at two corners are 54° and 49°. What is the exterior angle at the third corner?
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103
Hint: An exterior angle equals the sum of the two interior angles that are not next to it.