Corners and sides II

This task is about shapes.
 
Shapes have corners and sides.

Question

a)  Choose all the shapes that have exactly 4 sides.
    • pentagon-arrow-shape-H_1.png

    • green-fat-cross.png

    • WSAI-st-option-6.png

    • triangle-3.png

    • possible-rectangle-shape-3.png

    • polygon-shape-II.png

Question

b)  Choose all the shapes that have exactly 4 corners.
    • pentagon-arrow-shape-H_1.png   

    • green-fat-cross.png   

    • triangle-3.png    

    • poss-square-7.png   

    • WSAI-st-option-6.png

    • blue-angled-rectangle.png

Question

c)  Choose all the shapes that have exactly 3 corners.
    •  triangle-8b.png

    • WSAI-st-option-6.png

    •  WSAI-st-option-1.png

    • triangle-3.png

    • triangle-6.png

    • green-triangle.png

Question

d)  Choose all the shapes that have more than 4 sides.
    • blue-angled-rectangle.png

    • green-regular-pentagon.png

    • WSAI-st-option-1.png

    • pentagon-arrow-shape-H_1.png

    •  green-fat-cross.png

    •  triangle-3.png