classification of triangles more:label classification 20of 20triangles more:math

Congruent Triangles - When two triangles have (i) the same shape, and (ii) the same size, then they are said to be congruent triangles. Symbol for congruency is Draw with AB = 4 cm, AC = 5 cm, and . Also with DE = 4 cm, DF = 5 cm and Draw these triangles on a..

Area of a triangle - If the coordinates of the vertices of the D ABC are A(x 1 ,y 1 ), B(x 2 ,y 2 ) and C(x 3 ,y 3 ), then the area of triangle is given ..

If the coordinates of the vertices of the D ABC are A(x 1 ,y 1 ), B(x 2 ,y 2 ) and C(x 3 ,y 3 ), then the area of triangle is given ..

Problems on Congruent Triangles - Prove that AP = BQ (see the figure). and AQ = BP AP = ..

Question 1 - Question: Using Heron's formula find the area of an equilateral triangle whose perimeter is 15 cm. Answer: Perimeter = 15 cm Each side (a) = 5 ..

Interior and Exterior angles of a triangle - In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangle. Now obs..

In a triangle when we refer to an angle, we mean the angle bounded by the two sides. The three angles lie in the interior region of the triangle. These angles are called the interior angles of the triangle. Now observe the triangle in which the sides are pr..

Question 1 - Question: Answer: Data: AB = BC and AD = CE To prove: AD = CE Proof: AB=BC (data) AD=CE (data) BD=BE (If equals are subtracted from equals, the remainders are also equal) In D AEB and D CDB, AB=BC (data) BE=BD (proved above) (common angle to both the triangles..

Point - It is an exact location. It is a fine dot which has neither length nor breadth nor thickness but has position i.e., it has no magnitude. It is denoted by capital letters A, B, C, O et..

Concurrency of the angle bisectors of a triangle - Draw a triangle ABC. Draw its angle bisectors. The angle bisectors pass through a point. Recall the procedure to draw angle bisectors: With B as centre and with a convenient radius draw an arc of a circle to cut AB and AC at X a..