What is the area of the triangle? (A) Two sides are 41 cm each (B) The altitude to the third side is 9 cm long.
Option (d)
If the altitude to the base of an isosceles triangle is known, the base can be found, and hence the area.
What is the ratio of radii of the circumcircle and the incircle of a polygon of 12 sides (A) The polygon is a regular one of side 8 cm. (B) One angle measures 150∘