Angles opposite to the equal sides are equal in measure. Some important properties of the isosceles triangle are, What are the properties of the Isosceles Triangle? Here, one interior angle of the triangle is equal to 90°, while the other angles are acute angles and each measures 45°. Isosceles right triangle, is a triangle which is a isosceles triangle and has a right angle. Isosceles triangles are classified into three types depending on the measures of angles, which include What are the Different Types of Isosceles Triangles? If the base of the isosceles triangle is b units and its height is h units then its, area is given as,Ī = (½)×bh units 2 4. The area of an isosceles triangle is the space occupied by the boundary of the isosceles triangle. What is the Area of the Isosceles Triangle? If the isosceles triangle has equal side a and unequal side b then,ģ. The perimeter of an isosceles triangle is equal to the sum of its three side lengths. What is the Perimeter of an Isosceles Triangle? What is Isosceles Triangle?Īn isosceles triangle is a triangle with at least two sides equal and the corresponding angles opposite to them are also equal. Q5: Find the area of an isosceles triangle whose base is 12 cm and equal sides are 13 cm. Q4: If the perimeter of an isosceles triangle is 25 cm and the unequal side is 5 cm. Also state what type of the triangle is this based on the value of all the three angles. Q3: If the equal angles of an isosceles triangle measures 60°, find the third angle. Q2: If the height of a isoceles triangle is 4 cm and base is 6 cm find the length of equal sides. Q1: What is the perimeter of a field whose shape is in form of a triangle having two equal sides of 10m and third side being 5m. Hence, the area of the given isosceles triangle is 168 sq. The height, perimeter, and area are the three basic formulas of an isosceles triangle, which are discussed below. If we have an Isosceles triangle ABC then,ĪB = AC ⟺ ∠ABC = ∠ADC Isosceles Triangles Formulas “If two angles in any isosceles triangle are equal then the side opposite to them are also equal.” The converse of this theorem is also true which states that “If two sides in any isosceles triangle are equal then the angle opposite to them are also equal.” The Isosceles Triangle Theorem states that,
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