The circumference of an isosceles trapezoid is 50cm, the waist and height are 10cm and 8cm respectively. What is the area of this trapezoid?

The circumference of an isosceles trapezoid is 50cm, the waist and height are 10cm and 8cm respectively. What is the area of this trapezoid?

(50-10 × 2) × 8 / 2 = 30 × 8 / 2 = 240 / 2 = 120 (square centimeter) a: the area of this trapezoid is 120 square centimeter

The circumference of an isosceles trapezoid is 50cm, the waist and height are 10cm and 8cm respectively. What is the area of this trapezoid?

(50-10 × 2) × 8 / 2 = 30 × 8 / 2 = 240 / 2 = 120 (square centimeter) a: the area of this trapezoid is 120 square centimeter

If the base of an isosceles triangle is 10 cm and the circumference is 36 cm, its area is 0______ cm2．

According to the meaning of the question: BC = 10cm, △ ABC circumference is 36cm, ab = AC, through point a ad ⊥ BC at point D, ∵ AB = AC, ∵ BD = 12bc = 5cm, ab = 36 − 102 = 13 (CM), ∵ ad = AB2 − BD2 = 12 (cm), ∵ s △ ABC = 12bc · ad = 12 × 10 × 12 = 60 (cm2)