UNIT 1--day 1

In this Blog entry, we will teach you how to find the area of a square, rectangle, triangle, trapezoid, parallelogram, circle and a polygon. Also, we will define what a point, a line, segment, ray, angle, median, altitude and perpendicular, along with some practical application.

The area formulas are as follows:

Square:
A^2 where "A" is a side length.

Triangle:
1/2 (b x h)
B= base length
H= height

Rectangle:
W x H
W= width
H= height

Circle:
3.14 x  r^2
R=radius

Parallelogram
B x H

Trapezoid:
 1/2 (a+b) x H
A= side length one
B= side length two
H= height

Polygon
 1/2 (apothem) (perimeter)

Also, we need to define...

Point:A point is an exact position or location on a plane surface. It is important to understand that a point is not a thing, but a place.

Line: A straight slope showing either growth, decline or constancy on a graph. extends infinently from both sides

Plane: A 2 dimensional figure

Line Segment: A part of a line with two dots on either end, sectioning off a part of a line, finite distance

Ray: a line that extends infinently in one direction

Angle: A shape created by two lines or rays diverging from a common point

Median: the middle

Altitude: otherwise known as the height of a triangle.


Perpendicular: A line is perpendicular to another if it meets or crosses it at right angles (90°). 








QUIZ
A- a triangle has a base of 5 and a height of 2, what is the area?
B- a circle has a radius of 20, what is the circumference?
C- a parallelogram is 30 by 20ft, what is the area?








answers
A-area is 5ft2
B- 396.6ft2
C- 50ft2