What is the area of a right-angled triangle with a base of 12 cm and a hypotenuse of 13 cm?
A30 cm²
B60 cm²
C65 cm²
D78 cm²
Explanation
Using Pythagoras theorem: Height² = Hypotenuse² − Base² = 13² − 12² = 169 − 144 = 25. Thus, Height = 5 cm. Area = 0.5 × Base × Height = 0.5 × 12 × 5 = 30 cm².
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Triangles and Area
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