1.
What do similar figures have in common?
Correct Answer
A. Same shape
Explanation
Similar figures have the same shape but may differ in size. While angles remain congruent, lengths of corresponding sides are proportional, which leads to varying perimeters and areas.
2.
If one side of a triangle is proportionally doubled, how does the area change?
Correct Answer
B. Quadrupled
Explanation
When a side of a triangle is doubled, its area becomes quadrupled due to the relationship between sides and areas in similar figures.
3.
What's the relationship between the perimeters of similar polygons?
Correct Answer
A. Directly proportional
Explanation
The perimeters of similar polygons are directly proportional to their corresponding sides. Doubling the side lengths results in a doubled perimeter, maintaining this linear relationship.
4.
How are the areas of similar triangles related if the ratio of their sides is k:1?
Correct Answer
A. K^2 times
Explanation
The areas of similar triangles are proportional to the square of the ratio of their corresponding sides. This relationship is vital for solving problems involving similar triangles and their areas.
5.
If a rectangle's length and width are both doubled, how does the area change?
Correct Answer
B. Quadrupled
Explanation
Doubling both the length and width of a rectangle results in its area becoming quadrupled, showcasing the relationship between area and side length changes in similar shapes.
6.
What's the ratio of the areas of two similar circles if their radii are in a 2:5 ratio?
Correct Answer
B. 4:25
Explanation
The ratio of the areas of two similar circles is the square of the ratio of their radii. In this case, the ratio of radii is 2:5, leading to an area ratio of 4:25.
7.
If the side length of a square is tripled, how does the area change?
Correct Answer
B. Nine times
Explanation
When the side length of a square is tripled, its area increases by a factor of nine. This emphasizes the squared relationship between side length and area in square-shaped similar figures.
8.
What's true about the angles in similar figures?
Correct Answer
A. They are congruent.
Explanation
The angles in similar figures remain congruent. Regardless of size changes, corresponding angles maintain their measures, contributing to the overall similarity of the figures.
9.
How does the ratio of the areas of two similar rectangles change if their sides are doubled?
Correct Answer
B. Quadrupled
Explanation
If the sides of two similar rectangles are doubled, their areas become quadrupled. This highlights the squared relationship between side lengths and areas in rectangles.
10.
If a triangle's height is halved while its base remains unchanged, how does the area change?
Correct Answer
A. Halved
Explanation
When the height of a triangle is halved while the base remains unchanged, its area becomes halved. This demonstrates the proportional relationship between height and area in similar triangles.
11.
What's the relationship between the areas of similar polygons?
Correct Answer
A. Directly proportional
Explanation
The areas of similar polygons are directly proportional to the square of the ratio of their corresponding sides. This proportionality ensures that the areas grow or shrink consistently.
12.
How does the ratio of the perimeters of two similar squares change if their sides are doubled?
Correct Answer
A. Doubled
Explanation
Doubling the sides of two similar squares results in a doubled perimeter ratio. This linear relationship between side lengths and perimeters remains consistent in square-shaped similar figures.
13.
What's the ratio of the perimeters of two similar rectangles if their sides are in a 3:4 ratio?
Correct Answer
A. 3:4
Explanation
The ratio of the perimeters of two similar rectangles is equal to the ratio of their corresponding sides. In this case, the ratio is 3:4, leading to a perimeter ratio of 3:4
14.
How does the area of a triangle change if its height and base are both doubled?
Correct Answer
B. Quadrupled
Explanation
Doubling both the height and base of a triangle leads to a quadrupled area. This relationship highlights the direct relationship between the length of the base and the height of a triangle.
15.
What's the ratio of the areas of two similar squares if their side lengths are in a 1:3 ratio?
Correct Answer
B. 1:9
Explanation
The ratio of the areas of two similar squares is the square of the ratio of their side lengths. In this case, the ratio of side lengths is 1:3, resulting in an area ratio of 1:9.