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March 5, 2015

March 5, 2015

Posted by **zoya** on Saturday, September 22, 2012 at 5:46pm.

AB=BC=7cm. BM=5cm

m is the midpoint of the line segment AC.

a) explain why angle AMB must be a right angle.

b) calculate angle BCM.

c) calculate area of the triangle

- Trigonometry -
**Steve**, Sunday, September 23, 2012 at 7:16amABC is an isosceles triangle, so the altitude BM intersects AC in the middle.

cos BCM = 5/7

area = 1/2 AC * BM

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