Question

congruent? yes no yes no

Explanation:

Step1: Recall the definition of congruent figures

Congruent figures have the same shape and size.

Step2: Analyze the first pair (triangles)

The two triangles have the same shape (right - angled triangles) but different sizes.

Step3: Analyze the second pair (circles)

The two circles have the same shape but different sizes.

Step4: Analyze the third pair (irregular shapes)

The two irregular - shaped figures have the same shape and size (one can be rotated to match the other).

Step5: Analyze the fourth pair (rectangles)

The two rectangles have the same shape but different side - length ratios (so different sizes).

Answer:

First pair: No; Second pair: No; Third pair: Yes; Fourth pair: No