The perimeter of an equilateral triangle is 72 cm. Find its midline.
| November 23, 2020 | education
You draw an equilateral triangle and draw a horizontal line in the middle of the triangle (any letters) МN
Given: triangle ABC is equilateral.
P = 72 cm.Find: МN
Decision:
In an equilateral triangle, all sides are equal. → AB = BC = AC = 72: 3 = 24 (cm) side of the triangle.
MN – Wednesday line, then MN = (fraction) 1 / 2AC
AC = 24cm → NM = 12 cm
Answer: 12 cm.
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