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Key learning points. All triangles have 3 straight sides and 3 vertices. Equilateral triangles have 3 equal sides and 3 equal angles. Isosceles triangles have 2 equal sides and 2 equal angles. Scalene triangles have no equal sides and no equal angles.
An isosceles trapezium has: One pair of unequal parallel sides. Two non-parallel equal sides. Two pairs of adjacent equal angles. Diagonals that are equal in length. One line of symmetry.
01:48. Quadrilaterals have 4 straight sides and 4 angles. These are the common properties. Here are some examples of quadrilaterals and their properties: Square. Properties: all sides all of an...
Discover the different types of triangles and find out the difference between an equilateral, scalene, isosceles and right-angled triangle in this KS2 guide.
Base Angles. Diagonals. The defining trait of this special type of trapezoid is that the two non-parallel sides (XW and YZ below) are congruent.
Mar 4, 2023 · An isosceles triangle has 2 equal sides and 2 equal angles. A right triangle has one 90° angle. You should know the names and properties of the different types of quadrilaterals. These are squares, rectangles, parallelograms, rhombuses, trapeziums and kites.
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The Isosceles triangle shown on the left has two equal sides and two equal angles. Scalene Triangle. The Scalene Triangle has no congruent sides. In other words, each side must have a different length. Acute Triangle. The Acute Triangle has three acute angles (an acute angle measures less than 90°). Obtuse Triangle.
