Question

Oblicz pole z kazdego z ponizszych trapezow. b) c) e)
b) 2.2m 1.7m 3.5m
c) 17cm 38cm 25cm
e) 45cm 34cm 40cm

Answer 1

Pole trapezu to
P = 1/2(a + b)h
b)
2.2m 1.7m 3.5m
a = 2,2m
b = 1,7m
h = 3,5m
P = 1/2(2,2m + 1,7m)*3,5m =
= 1/2 * 3,9m * 3,5m = 0,5 * 13,65m² = 6,825m²
c)
17cm 38cm 25cm
a = 17cm
b = 38cm
h = 25cm
P = 1/2(17cm + 38cm) * 25cm =
= 1/2 * 55cm * 25cm = 0,5 * 1375cm² = 687,5cm²
e)
45cm 34cm 40cm
a = 45cm
b = 34cm
h = 40cm
P = 1/2(45cm + 34cm) * 40cm =
= 1/2 * 79cm * 40cm = 0,5 *  3160cm² = 1580cm²