Question

How to find and compare lengths of segments and measures of angles


How to find the perimeter, circumference, and area of basic shapes

Answer 1

Use a ruler to measure the length of segments.
Use a protractor to measure angles.
Perimeter: the sum of the lengths of all the sides of a polygon.
Circumference of circle with diameter d ad radius r: \(C = \pi d = 2 \pi r\)
Area of circle with radius r: \(A = \pi r^2\)
Area of square with side s: \(A = s^2\)
Area of rectangle with sides L and W: \(A = LW\)
Area of triangle with base b and height h: \(A = \dfrac{bh}{2} \)

Answer 2

protracter