A triangle has sides of 10.5 inches, 7.4 inches and 6.3 inches. The perimeter of the triangle is ___ inches.

24.2

Step-by-step explanation:

The perimeter is the sum of the sides:

10.5 + 7.4 + 6.3 = 24.2

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2