if the area is 30, and the base of the triangle is 10. the way you would find the area is 1/2 base x height. so you would divide 10 by 2 to give you 5. and then ofc 5 x 6 equals 30. but, it’s 10. either way that will give you 30. 10 x 6 = 60, divided by 2 equals 30.
