Math for Elementary Teachers 2 Exam 2

Definitions from Q, R,S,&T

Define Triangle

A closed shape in the plane made of 3 line segments

Define isosceles triangle

A triangle that has at least two sides have the same length

Define quadrilateral

A closed shape in the plane made of 4 line segments that do not intersect except at endpoints.

Define square

a quadrilateral with 4 equal sides and 4 right angles

define rectangle

a quadrilateral with 4 right angles

Define rhombus

a quadrilateral with 4 equal sides

Define parallelogram

a quadrilateral in which both pairs of opposite sides are parallel

Define trapezoid

a quadrilateral in which at least one pair of opposite sides are parallel

Define polygon

a closed shape in the plane mad of finitely many line segments

What does it mean to measure a quantity?

To compare that quantity to a fixed unit

What does it mean to say that the area of a two dimensional shape is 10 square inches?

The shape can be covered with 10 one-inch squares without groups and without overlaps

Define the number of pie

the ratio of the circumference of any circle over its diameter

Define circle

the set of all points in the plane which are a certain fixed distance from a certain fixed point

Define sphere

the set of all points in space which are a certain fixed distance from a certain fixed point

State the Pythagorean Theorem

If a and b are the legs of a right triangle and if c is the hypotenuse then a²+b²=c²