In an isosceles triangle, the side is 10 and the angle opposite the base is 120 degrees. Find the area of the triangle.
| May 18, 2021 | education
The area of an isosceles triangle can be found on two equal sides and the angle between them. To do this, you need to multiply half of the product of two sides by the sine of the angle between them.
S = (10 cm * 10 cm) ÷ 2 * sin120 ° = 50 cm² * 0.87 = 43.5 cm².
Answer: the area of the triangle is 43.5 cm².
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