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Area of Basic Shapes
Triangle, Circle, Parallelogram, Trapezoid
Question | Answer |
---|---|
The area formula for a triangle is... | (1/2)*b*h |
The area formula for a parallelogram (including rectangle and square) is... | b*h |
The area formula for a rhombus (using diagonals) is... | (1/2)d1*d2 |
The area of a trapezoid is... | (1/2)*h*(b1+b2) |
The area of a circle is... | pi*r^2 |
The circumference of a circle is... | 2*pi*r |
When determining the height of an object, always remember that the height must be... | PERPENDICULAR to the base! |
The area of a regular polygon is... | (1/2)*a*p (a=apothem, p=perimeter) |
In a 45-45-90 triangle, the length of the hypotenuse is... | (length of leg)*(sq.rt. 2) |
In a 30-60-90 triangle, the length of the longer leg is... | (length of shorter leg)*(sq.rt.3) |
In a 30-60-90 triangle, the length of the hypotenuse is... | (length of shorter leg)*2 |