Question

identifying congruent shapes on a grid

Explanation:

Step1: Recall the definition of congruent shapes

Congruent shapes have the same size and shape.

Step2: Analyze the first pair of triangles

One is an equilateral - like triangle, the other is a right - triangle. Their shapes are different.

Step3: Analyze the pair of circles

The sizes of the two circles are different.

Step4: Analyze the first pair of irregular shapes

They have the same size and shape (can be transformed into each other by translation).

Step5: Analyze the pair of rectangles

They have the same shape (rectangle) and size (length and width are equal as per grid - based measurement).

Answer:

First pair (triangles): No. Second pair (circles): No. Third pair (irregular shapes): Yes. Fourth pair (rectangles): Yes.