Angles and Triangles

Front

What is the scale of a drawing?

Back

A scale is a ratio that compares the dimensions of a drawing to the actual dimensions of the object. For example, a scale of 1 inch : 10 ft means that 1 inch on the drawing represents 10 feet in reality.

Front

How do you calculate the height of a building in a scale drawing?

Back

To find the height in a scale drawing, divide the actual height by the scale factor. For example, if a building is 300 ft tall and the scale is 1 inch : 10 ft, the height in the drawing is 300 ft ÷ 10 ft/inch = 30 inches.

Front

What is the sum of the angles in a triangle?

Back

The sum of the interior angles in any triangle is always 180 degrees.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180 degrees. For example, if the angles are 30 and 70 degrees, the third angle is 180 - (30 + 70) = 80 degrees.

Front

What is a vertex in a triangle?

Back

A vertex is a point where two sides of a triangle meet. In a triangle ABC, the vertices are points A, B, and C.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Front

What are the different types of triangles based on their angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).