In a right-angled triangle with legs 12 and 16 cm, find the height drawn from the top of the right angle.
September 2, 2021 | education
| First, we find the length of the hypotenuse by the Pythagorean theorem.
c = √ (144 cm² + 256 cm²) = √400 cm² = 20 cm.
The height drawn from the top of the right angle divides the hypotenuse into 2 segments. Let’s find the length of one segment along the hypotenuse and the adjacent leg.
n = 144 cm² ÷ 20 cm = 7.2 cm.
The height also divides the triangle into 2 right-angled triangles, in which it is the leg. Let’s find it by the Pythagorean theorem.
h = √ (144 cm² – 51.84 cm²) = √92.16 cm² = 9.6 cm.
Answer: the height is 9.6 cm.
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