Indirect Measurement

Front

What is Indirect Measurement?

Back

Indirect measurement is a technique used to measure an object that is difficult to measure directly by using the properties of similar triangles.

Front

What are similar figures?

Back

Similar figures are shapes that have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are in proportion.

Front

What does it mean for angles in similar figures?

Back

All angles in similar figures are congruent (equal in measure).

Front

How do you find the height of an object using indirect measurement?

Back

You can use the properties of similar triangles or the shadow method to find the height of an object indirectly.

Front

What is the formula for finding the height of a flagpole using shadows?

Back

Height of the flagpole = (Height of the object casting the shadow / Length of the shadow of the object) * Length of the shadow of the flagpole.

Front

If two triangles are similar, what can be said about their sides?

Back

The corresponding sides of similar triangles are in proportion.

Front

What is the relationship between the sides of similar triangles?

Back

If triangle A is similar to triangle B, then the ratio of the lengths of corresponding sides is equal.

Front

How do you determine if two figures are similar?

Back

Two figures are similar if their corresponding angles are equal and the lengths of their corresponding sides are proportional.

Front

What is the significance of the term 'congruent' in geometry?

Back

Congruent means that two figures have the same shape and size, meaning all corresponding sides and angles are equal.

Front

What is the width of the river if the indirect measurement gives a result of 45 feet?

Back

The width of the river is 45 feet.