Mathematics Challenge for Grade 7

What is a rational number? Give an example.

• -2

• sqrt(2)

• 3/4

• 1/2

Identify whether the number 3.5 is rational or irrational.

• irrational

• rational

• integer

• whole number

Classify the angle of 45 degrees as acute, right, or obtuse.

• acute

• obtuse

• straight

• reflex

What type of angle is formed by two perpendicular lines?

• Obtuse angle

• Straight angle

• Right angle

• Acute angle

If one angle measures 30 degrees, what is the measure of its complement?

• 30 degrees

• 90 degrees

• 60 degrees

• 45 degrees

Calculate the area of a triangle with a base of 10 cm and a height of 5 cm.

• 15 cm²

• 25 cm²

• 30 cm²

• 20 cm²

What is the formula for the area of a triangle?

• Area = base + height

• Area = base * height

• Area = 2 * base * height

• Area = 1/2 * base * height

If the sides of a triangle are 3 cm, 4 cm, and 5 cm, is it a right triangle?

• No, it is an obtuse triangle.

• Yes, it is an equilateral triangle.

• No, it is a scalene triangle.

• Yes, it is a right triangle.

Determine the properties of a parallelogram.

• Opposite sides are unequal; adjacent angles are equal; diagonals intersect at right angles.

• Opposite sides are equal and parallel; opposite angles are equal; diagonals bisect each other.

• All sides are equal and perpendicular; all angles are 90 degrees; diagonals are equal in length.

• Only one pair of opposite sides is equal; adjacent angles are supplementary; diagonals do not bisect each other.

How many sides does a quadrilateral have?

• 4

• 3

• 6

• 5