Congruent Ovals and Transformations

Lesson 13 reviews congruent images, showing how they can be transformed to overlap exactly. It uses ovals to demonstrate congruence through rotation and translation. The lesson also explains why some ovals are not congruent due to positional differences, providing a deeper understanding of congruence.

What is a key characteristic of congruent images?

• They cannot be moved.

• They have different sizes.

• They can be transformed to cover each other.

• They have different shapes.

How can the left oval be transformed to match the right oval?

• Rotate it 45 degrees and slide it left.

• Rotate it 180 degrees and slide it up.

• Rotate it 90 degrees and slide it down.

• Rotate it 90 degrees and slide it up.

What is the distance across the congruent ovals?

• Three units

• Five units

• Six units

• Four units

What is the distance from the top to the bottom of the congruent ovals?

• Three units

• Four units

• Six units

• Five units

Where is the top point of the left oval positioned?

• Two units from the right

• Two and a half units from each end

• One unit from the top

• Three units from the left

How is the right oval positioned differently from the left oval?

• It is shifted half a unit to the right.

• It is shifted one unit to the left.

• It is shifted two units to the right.

• It is shifted one unit to the right.

Why are the two ovals not considered congruent?

• Their sizes are different.

• They have different shapes.

• They have different colors.

• Their positions are different.

What is the distance from the left side to the top point of the right oval?

• Four units

• Three units

• Two units

• Five units