exam Maths Puzzle Numerical Ability

the height of a triangle is 2 more than twice the base. the area is 20 square feet. find the base.

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exam Other Question

1) In a quadrilateral, the measures of three of the angles are 77 degrees, 124 degrees, 112 degrees. How big is the fourth angle?

2) How big is each angle in a regular octagon? hOW DO i SOLVE FOR Z? -2/3(2Z+3)=1/2(1-Z) iKEEP GETTING -1