Quadrilaterals, diagonal of a quadrilateral, types of quadrilaterals, rectangle, square, parallelogram, rhombus, trapezium, regular trapezium, kite, angle sum of a quadrilateral and applying properties of quadrilaterals to solve problems.
Sperm whales make some of the longest dives achieved by mammals, with some lasting up to 90 minutes, while dolphins and other whales can stay underwater for 20 minutes. The longest time a human has held their breath for under water is 19 minutes â set by a Swiss freediver called Peter Colat.
The Bottlenose whales and Sperm whales can stay underwater for almost 2 hours on long dives. Most of the large whales, like the Blue whale and the Fin whales, rarely stay down longer than 40 minutes while large dolphins such as the Bottlenose dolphin usually stay down for less than 15 minutes.