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Transcript
```STAAR Readiness Standard: Grade 8 Math (8.9 B)
Name:
Date:
Objective: Students will use proportional relationships in similar two-dimensional figures or similar
three-dimensional figures to find missing measurements.
Academic Vocabulary: After watching the Brain POP: Similar Figures movie, explain the terms
1. Geometrically Similar:
To have the same shape but not necessarily the same size
2. Equilateral Triangle:
A triangle that has 3 sides of equal length and 3 equal angles
3. Scalene Triangle:
A triangle with 3 different side lengths and 3 different angles
4. Congruent:
Equal in size, shape or both
5. Proportional:
The same in length
6. Scale Factor:
Simplify the ratio between any two corresponding measurements, not including angles
7. Indirect Measurement:
The way to measure things that are way too big to measure directly
8. Choose an additional term from the movie to define:
Angle: The measurement of points on a shape
9. The Orlando Magic’s court is similar to a playground court. The ratio of the
corresponding side lengths is 10:7. What is the ratio of the areas? Answer: 30:21
If two figures are
similar, then the
ratio of their areas
is equal to the
square of the ratio
of their
corresponding side
lengths.
10
7
10. The ratio of the corresponding side lengths of two similar computer screens is 13:15.
The perimeter of the smaller screen is 39 inches. What is the perimeter of the larger
screen?