![]() To Construct a Triangle whose Three Sides are given. (vi) A triangle with unequal sides is called a ……………………… (v) A triangle whose 2 sides are equal is called a ……………………… (iv) A triangle with all sides equal is called a ……………………… ![]() (iii) A triangle can be classified on the basis of ……………………… Sample: AC the legs of an isosceles triangle are. 15 120 90 30 isosceles 69 37 45 180 72 8 100 Yes, because the measure of the smaller angle is 30. The video explores how triangles are classified based on their sides and angles. Sample: lBEC all the angles of an equilateral triangle are congruent. (i) A triangle is ……………………… sided polygon. Sample: lBED the base angles of an isosceles triangle are congruent. (e) A triangle can have two obtuse angles. (d) Equiangular triangle has its three sides also equal. ![]() (b) If one angle of a triangle is obtuse, the other two angles must be acute. (a) All the angles of an isosceles triangle are equal. Find the other acute angle.ġ6. Say whether the following statements are true or false: What kind of triangle is this?ġ5. One of the acute angles of a right triangle is 48°. Find the length of its third side.ġ4. Each side of a ∆ is one third of its perimeter. Determine the other angles.ġ3. The perimeter of a triangle is 24 cm. Find the measure of each angle of the triangle.ġ2. One of the two equal angles of an isosceles triangle measures 55°. Measure its sides andĬlassify the triangle as Isosceles triangle, scalene triangle or equilateralġ1. The angle of a triangle is in the ratio of 2: 3: 4. Substitute the decimal dimensions in the formula A 1/2 b h to compute the area of the isosceles triangles. Find the height of the isosceles triangles presented in these worksheets for grade 6, grade 7, and grade 8. (c) LM = 4.5 cm, MN = 3.6 cm, NL = 6.2 cm.ĩ. If in a triangle LMN: (a) ∠L = 80°, ∠M = 50°, find ∠N, (b) ∠M = 60°, ∠N = 60°, find ∠L, (c) ∠M = 100°, ∠ N = 30°, find ∠ L, (d) ∠N = 90°, ∠L = 45°, find ∠M. W R2R0 Y1p1Y aK FuCtTa n 5Snogf Stw2asr1e A xL 4L eCs.A b bAzlEl6 orwijgdh Ot6sm Ornezs qe qr bvMead r.U b IM hald Veb BwCiVthG zIan if Zi2n3iutYeu oGye1orm oe Rtor vyp. Area of Scalene Triangles Decimals- Type 1. A 3D triangle is called a triangular prism or triangular pyramid. Triangles always have three sides and three vertices. The four types of triangles are equilateral, scalene, right-angled, and isosceles. The angles in a triangle always add up to 180°. (a) AB = 7.6 cm, BC = 4.5 cm, CA = 6.3 cm. Five facts about triangles to teach your class. (e) 50°, 50°, 90° (f) 10 cm, 12 cm, 2 cm.Ĩ. Find the perimeter of a triangle when its sides are: ![]() (f) 3.5 cm, 3.5 cm, 4.5 cm.ħ. Is it possible to have a triangle with the following angles and sides? Give reason in support of your answer. Classify the triangle according to sides, that is, equilateral, isosceles and scalene triangles ![]()
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