These two quadrilaterals are congruent. ... Shapes I and L are congruent triangles. When I is rotated 90° anti-clockwise it has the same orientation as L. Back to top. Similar shapes.

For triangles and quadrilaterals, the answer is, remarkably, always! We can rotate any triangle 180 degrees about the midpoint of one of its sides to make a parallelogram, which tiles easily.

Check CBSE Class 9 Maths Chapter 8 Quadrilaterals Extra Questions and ... of its sides at 25° as shown in the following figure. ... the rectangle into two congruent right triangles. 4.

A new study shows that like humans, crows can recognize geometric regularity, making them the first nonhuman animal known to have this ability. Squares, triangles, circles - these geometric shapes ...