exam Maths Puzzle Numerical Ability

Triangle ABC is an equilateral triangle.D is the midpoint of seg AD. Prove that 4MB = square root of7 BC

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exam Other Question

The base-path of a baseball diamond form a square. If it is 90ft from home to first, how far does the catcher have to throw to catch someone stealing second base? Suppose you have a Venn diagram showing three sets. Call the sets A, B, and C. How many regions of the Venn diagram correspond to elements that are part of set A? Why so many?