Find the areas of these triangles using the correct formulae.
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Answer:
(a) 6cm²
(b) 15cm²
(c) 104.9571341072154 cm²
Step-by-step explanation:
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The formula for finding the area of a triangle = (1/2) × base × height
a) Pythagoras theorem:
a² + b² = c²
a² + 4² = 5²
a² = 9
a = 3
Base = 4cm
Height = 3cm
Area = (1/2) × 4 × 3 = 6cm²
b) Base = 6cm
Height = 5cm
Area = (1/2) × 6 × 5 = 15cm²
c) It is not possible to find the area of this triangle because the value of the base is not given. It is not even a right angled triangle, so Pythagoras theorem cannot be used.
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