Solve.
-If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its area. and

c

are the three lengths of the sides, Heron's formula for area is:

A = \sqrt { s ( s - a ) ( s - b ) ( s - c ) }

where

s

is half the perimeter of the triangle, or

s = \frac { 1 } { 2 } ( a + b + c )

.
Use this formula to find the area of the triangle if

a = 9 \mathrm {~cm} , \mathrm {~b} = 11 \mathrm {~cm}

and

c = 16 \mathrm {~cm}

.
$Solve. -If the three lengths of the sides of a triangle are known, Heron's formula can be used to find its area. and c are the three lengths of the sides, Heron's formula for area is: A = \sqrt { s ( s - a ) ( s - b ) ( s - c ) } where s is half the perimeter of the triangle, or s = \frac { 1 } { 2 } ( a + b + c ) . Use this formula to find the area of the triangle if a = 9 \mathrm {~cm} , \mathrm {~b} = 11 \mathrm {~cm} and c = 16 \mathrm {~cm} . A) 3 \sqrt { 14 } \mathrm { sq } \mathrm { cm } B) 18 \sqrt { 7 } \mathrm { sq } \mathrm { cm } C) 18 \sqrt { 14 } \mathrm { sq } \mathrm { cm } D) 180 \sqrt { 15 } \mathrm { sq } \mathrm { cm } , b,$

A)

3 \sqrt { 14 } \mathrm { sq } \mathrm { cm }

18 \sqrt { 7 } \mathrm { sq } \mathrm { cm }

18 \sqrt { 14 } \mathrm { sq } \mathrm { cm }

180 \sqrt { 15 } \mathrm { sq } \mathrm { cm }

, b,

Solve -Find the Area of the Trapezoid 1837183 \sqrt { 7 }1837​

Multiple Choice

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Solve
-Find the Area of the Trapezoid $183 \sqrt { 7 }$

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