Question

if s=18 and a=7,b=8 .find c where a,b,c, are sides and s is semiperimeter

Answer 1

Step-by-step explanation:

Formulae of semi perimeter is a+b+c÷2. = 7+8+c ÷2 =15+c÷2 is equal to 18 so solve this equation (15+c)=2×18 = 15+c=36 C=36-15=21cm. hope this help you!!