the two sides of a parallelogram area 28 cm and 20 CM if length of a d

1.	the two sides of a parallelogram area 28 cm and 20 CM if length of a diagonal is 35 cm find the area of the parallelogram
Answer» ong>Step-by-step explanation: First we find AREA of ABC. Sides are, a = 28 cm b = 35 cm and c = 21 cm S = (a + b + c)/2 = (28 + 35 + 21)/2 = 84/2 = 42 cm = 2 × 20 × 7 = 240cm2 ∵ Diagonal of ∥ gm divides it into two equal parts. ∴ area of ∥ gm = 2 × area of ∆ ABC = 2 × 240 = 480cm2 please mark as BRAINLIEST

the two sides of a parallelogram area 28 cm and 20 CM if length of a diagonal is 35 cm find the area of the parallelogram

Answer»

ong>Step-by-step explanation:

First we find AREA of ABC.

Sides are, a = 28 cm

b = 35 cm

and c = 21 cm

S = (a + b + c)/2

= (28 + 35 + 21)/2

= 84/2 = 42 cm

= 2 × 20 × 7

= 240cm2

∵ Diagonal of ∥ gm divides it into two equal parts.

∴ area of ∥ gm = 2 × area of ∆ ABC

= 2 × 240

= 480cm2

please mark as BRAINLIEST