To work out the area of a triangle do 1/2 x base x height. So its 1/2 x 10 x 5 = 25cm squared :)
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The area of any triangle is (1/2) x (length of the base) x (height). We're sure you can take it from there.
15 square cm
60 sq cm
60 sq cm (10 x 12/2)
The area of a triangle is BH/2(base times height divided by two)so you plug in you numbers(10cm*15cm)/2and you get 75 cm^2