Question

The length of a rectangular greeting card is 15 cm and its diagonal is 17 cm. Find the perimeter of the greeting card. pls tell fast​

Answer 1

Answer:

Step-by-step explanation:

46

17^2 = 15^2 + W^2

W= 8

P = 2 (15+8) = 46

Answer 2

length of a rectangular greeting card = 15cm

diagonal = 17cm

first find breadth

diagonal = √ l² +b²

17cm = √ (15cm)²+ b²

(17cm)² = 225cm²+ b²

289cm² = 225cm² + b²

289cm² - 225cm² = b²

64cm² = b²

√ 64cm² =b

b= 8cm

perimeter of greeting card = 2(l+b)

= 2 ( 15cm +8cm )

= 2 × 23cm

= 4 6 cm