Question

if the perimeter of a semi circular protactor is 36 cm , then find its diameter ?

Answer 1

perimeter of a semi circular protractor :

= perimeter of a semi circle = ( 2r+ πr) cm

2r+ πr = 36 [ given ]

$r(2 + \frac{22}{7} ) = 36$

$r \times \frac{36}{7} = 36$

r = 7 cm

diameter = 2r = 2× 7 = 14 cm

so cause the diameter of a semi circular protractor is 14 cm

be brainly

Answer 2

$<b><u><i>$Refer to the attachment

$<b><u><i>$Using the formula

$<b><u><i>$r = 7cm

$<b><u><i>$D = 2R

$<b><u><i>$D = 14cm