exam Maths Puzzle Numerical Ability

In rectangle ABCD, side AB=6, side BC=9, and diagonal AC is drawn. Find angle CAD to the nearest degree.

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exam Other Question

The length of the base of an isosceles triangle is 2 centimemters shorter than the length of either of the other sides. If the perimeter of the triangle is 16 centimeters, find the length of each side of the triangle. How many gallons of a 28% solution must be mixed with a 63% solution to obtain 100 gals. of 37% solution?