The red triangle is equilateral with a side of 23 centimetres. Its perimeter is	Select the correct option:	A) 68 cm	B) 69 cm	C) 70 cm	D) 71 cm	E) None
Solution:   All three sides of an equilateral triangle are equal. Thus, its perimeter will be 23 × 3 = 69 cm   Answer 69 cm
<result>B</result>
The red triangle is equilateral with a side of 23 centimetres. Its perimeter is