Question

diagonals of a rhombus are 20 cm and 21 CM respectively then find the side of rhombus and its perimeter​

Answer 1

Answer:

20.5 cm sq.

Step-by-step explanatiotn:

Area = 1/2*d1+d2

Area = 20 + 21/2

Area = 20.5 cm sq.

Answer 2

Answer:

Side = 14.5 cm

Perimeter = 58 cm

Step-by-step explanation:

Note:

1) Diagonals of a rhombus meet at right angle.

2) Half of each diagonals will form together with a side will form a right angle triangle.

3) All sides of a rhombus have equal length.

Find half the length of the diagonals:

half of one diagonal = 20 ÷ 2 = 10 cm

half of the other diagonal = 21 ÷ 2 = 10.5 cm

Find the length of the side:

a² + b² = c²

c² = 10² + 10.5²

c² = 210.25

c = 14.5 cm

Find the perimeter:

Perimeter = 4 x side

Perimeter = 4 x 14.5 = 58 cm