# If a semi circle has a diameter of 4cm then what is the perimeter?

##### 2 Answers

Jul 1, 2018

#### Explanation:

#"perimeter "=1/2pid+4#

#"that is the semi circle plus diameter"#

#"color(white)(xxxxxx)=(1/2xxpixx4)+4#

#color(white)(xxxxxx)=2pi+4~~10.283" cm to 3 dec. places"#

Jul 1, 2018

#### Explanation:

Substitute in ii,

Substitute in i,