HOTS Mathematics Primary 5 Area of Triangle

The area of triangle XYZ is 48 cm². Its height is 8 cm. A second triangle PQR has the same area as XYZ, but its base is twice as long as XYZ's base. What is the height of triangle PQR?

A 4 cm
B 8 cm
C 16 cm
D 2 cm
Show Worked Solution

Worked Solution

Step 1: Find the base of triangle XYZ. ½ × base × 8 = 48 base × 8 = 96 base of XYZ = 12 cm Step 2: Find the base of triangle PQR. Base of PQR = 2 × 12 = 24 cm Step 3: Find the height of triangle PQR. ½ × 24 × h = 48 12h = 48 h = 4 cm

Correct answer: 4 cm

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