Sunday, June 14, 2015

7th Grade Math - Types of Triangles

There are 6 basic types of triangles which are distributed into 2 different categories.
The first category is based upon measurement of angles. These triangles are Right triangle, Acute triangle, and Obtuse triangle.

The second category includes the triangles based on the measurements of their sides. These triangles are called Equilateral triangle, Isosceles triangle, and Scalene triangle. Here is a description of each of the triangles:

Right Triangle: One angle of exactly 90 degrees.
Acute Triangle: All three angles are less than 90 degrees.
Obtuse Triangle: Only one angle is more than 90 degrees.
Equilateral Triangle: All of the sides are of equal measurement.
Isosceles Triangle: Two of the sides are the same in measurement.
Scalene Triangle: All of the sides are of different measurement.

Types of Triangles -7th Grade Math

7th Grade Math - Vertical angles

Vertical Angles are two pairs of opposite angles made when two lines intersect. These two angles are same in measurement. So knowing this you can find the measurement of one of the angles using the measurement you already know. Also in total 4 angles are formed in vertical angles. For more details watch the video below.

What are Vertical Angles - 7th Grade Math

What are Corresponding Angles -7th Grade Math

Corresponding angles are angles that are in the same location at each intersection of lines. For example, let's say that a pair of parallel lines are being intersected by a transversal line. The two angles on the same location for each intersection will be known as corresponding angles. Also if the two lines are parallel then the corresponding angles will be of the same measurement.

What are Corresponding Angles -7th Grade Math

7th Grade Math - Circumference of a Circle

Circumference is the measurement of the outer boundary of a geometric figure, especially a circle. In order to calculate the circumference of a circle, you have to use the formula C = 2(pi)r in which C stands for circumference is equal to 2 times the value of pi times the radius. Once you have all of the values, you can simply substitute to find the circumference. In the following video, you will learn in complete detail how to calculate the circumference of a circle using various examples.

Circumference of Circle- 7th Grade Math

7th Grade Math - Area of Rectangle

In order to find the area of a rectangle, you simply multiply the length times the width. When it comes to seventh grade math however, we use expressions for the measurement rather than simple numbers. The formula stays the same. Once you have multiplied the length by the width, you substitute the value of the variable and calculate your final perimeter. Watch the following video for a more detailed explanation.

How to Find Area of Rectangle - 7th Grade Math

Saturday, June 13, 2015

7th Grade Math - Supplementary Angles

Supplementary angles are two angles that will always add up to 180  degrees. Let's say that we have an acute angle that is 80 degrees and an obtuse angle which is 100 degrees. If we add the two angles together, we get a supplementary angle. Therefore, supplementary angles are very easy to understand. For more details about supplementary angles, please watch the following video.

What are Supplementary Angles - 7th Grade Math

7th Grade Math - Types of Angles

There are 3 basic types of angles which are the following:

  1. Right angle
  2. Acute angle
  3. Obtuse angle

A right angle is exactly 90 degrees in measurement.
An acute angle is less than 90 degrees.
An obtuse angle is more than 90 degrees.

There is also a straight angle which is exactly 180 degrees, no more no less is measurement. The following video gives a further detailed explanation of the types of angles.

7th Grade Math - Types of Angles