2016 · Q57
The base of an isosceles triangle is 300 units and each of its equal sides is 170 units. Then the area of the triangle is
Elementary MathematicsMensuration
- A9600 square units
- B10000 square units
- C12000 square units
- DNone of the above
Explanation
Dropping the altitude to the 300-unit side splits it into 150+150, giving altitude √(170²−150²) = √6400 = 80. The area is ½·300·80. This equals 12000 square units, option C.