Question

A PQR is an equilateral triangle
with side 18 cm. A circle is drawn
on the segment QR as diameter. Find
the length of the arc of this circle within
the triangle.​

Answer 1

Answer:

the triangle PQR is a equilateral triangle with side 18 cm

PQ=QR=PR=18cm

as QR is the diameter of circle drawn

the arc within the circle is a semicircle

radius=18/2=9cm

semicircle=(22/7)*r

s=(22/7)*9

s=3.14*9

s=28.26cm ans