Triangles (III)

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

In Delta ABC, if cos A+cos B+cos C=(3)/(2) then the triangle is (i) Isosceles (ii) equilateral (iii) Right Angled (iv) none pf these

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.

The median of a triangle divides it into two congruent triangle (b) isosceles triangles right triangles (d) triangles of equal areas

ABC is a triangle in which angleABC=90^(@),BD is perpendicular to AC. Which of the following is TRUE? I. Triangle BAD is similar to triangle CBD. II. Triangle BAD is similar to triangle CAB. III. Triangle BAD is similar to triangle CAB.

On a squared paper,draw ( i ) a rectangle,(ii) a triangle (iii) any irregular closed figure.Find the approximate area of each by counting the number of squares complete,more than half and exactly half.

What types of hybridisation are associated with central atom when the atoms attached to it from (1) Equilateral triangle (ii) Linear structure (iii) Regular tetrahedron ?

Three statements are given below: I. In a ||gm, the angle bisectors of two adjacent angles enclose a right angle. I. The angle bisectors of a ||gm form a rectangle. III. The triangle formed by joining the midpoints of the sides of an isosceles triangle is not necessarily an isosceles triangle. Which is true?

Which of the following statements are true ? Justify your answer . (i) The set of dogs is contained in the set of animals. (ii) The set of all isosceles triangles is contained in the set of all equilateral triangles . (iii) The set of all rectangles is contained in the set of squares . (iv) The sets A = {x:x is letters in the word LITTLE} and B= {x:x is a letter in the word TITLE} are equal. (v) Every set has a proper subset.

Verify area of triangle is ( i ) 1/2 bc sin A (ii) Herons Formula (iii) 1/2(a+b+c)r