exam Maths Puzzle Numerical Ability

If a circle is projected from a fixed point that is 2 inches from a flat surface at an angle of 102 degrees; what is the diameter of the impact?

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exam Other Question

the total measure of two sides of a triangle is less than 90.the third angle is more than the sum of the measures of first two angles.what will be the measure of each angle. Find values for m and b in the following system so that the solution to the system is (-3,4).
5x+7y=b
mx+y=22