Triangles

Explain the following terms: Triangle (ii) parts or elements of a triangle Scalene triangle (iv) isosceles triangle Equilateral triangle (vi) acute triangle Right triangle (viii) obtuse triangle Interior of a triangle (x) exterior of a triangle.

Equilateral triangles I,Ill and IV are such that the altitude of triangle I is the side of triangle II,the altitude of triangle II is the side of triangle and the altitude of the triangle is the side of triangle IV.If the area of triangle I is 2cm^(2), then the area (incm ) of triangle IV is:

Without drawing the triangles write all six pairs of equal measures in each of the following pairs of congruent triangles. (i) Delta STU approx Delta DEF (ii) Delta ABC approx Delta LMN (iii) Delta YZX approx PQR (iv) Delta XYZ approx Delta MLN

Scalene Triangle a triangle whose no two sides are equal is called a scalene triangle.

Area OF Triangle || Quadrilateral || Centres OF Triangle

Problems on Pedal Triangle and Excentre Triangle

Is it true to say that, if in two triangles, an angle of one triangle is equal to an angle of another triangle and two sides of one triangle are proportional to the two sides of the other triangle, then the triangles are similar? Give reason for your answer.

If the circumcentre of a triangle lies outside the triangle then the triangle is