exam Maths Puzzle Numerical Ability

Quadrilateral BDEF is a rhombus with vertices on triangle ABC. Given AB=10, and BC=15, find DE.

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exam Other Question

Factor:


x^2+6x-16
b-2

Find the total surface area and volume of each solid object. round to the three significant digit.

this object is a cone.

Height is: 18'
diameter is:20'
slant is:20