Foundation Mathematics Primary 5 Area of Triangle

Triangle PQR has PQ as its base. PQ = 10 cm, the side PR = 8 cm, and the perpendicular distance from vertex R to the line PQ is 6 cm. Which measurement is the height of the triangle?

A 6 cm
B 8 cm
C 10 cm
D 14 cm
Show Worked Solution

Worked Solution

Step 1: Recall the definition of height in a triangle. The height of a triangle is the perpendicular (90°) distance from a vertex to the opposite base (or its extension). Step 2: Identify the perpendicular distance from vertex R to base PQ. The perpendicular distance from R to PQ is given as 6 cm. Step 3: PR = 8 cm is a slant side, not the height. PQ = 10 cm is the base. Answer: The height is 6 cm.

Correct answer: 6 cm

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