Name each of the following triangles in two different ways: ( you may judge the nature of the angle by observation)(e)

Name each of the following triangles in two different ways: ( you may judge the nature of the angle by observation)(f)

Name the types of following triangles:(e) ∆XYZ with m∠Y =90⁰ and XY=YZ.

Rewrite the following statement with “if-then” in five different ways conveying the same meaning. If a natural number is odd, then its square is also odd.

Classifly each one of the following angles as right, straight, acute, obtuse or reflex:(e)

For each of the following, draw a circle and inscribe the figure given. If a polygon of the given type can’t be inscribed, write not possible. (a) Rectangle (b)Trapezium (c) Obtuse triangle (d) Non-rectangular parallelogram (e) Accute isosceles triangle

In each of the following questions, we ask you to prove a statement. List all the steps in each proof, ang give the reason for each step. 6. A line parallel to side BC of a triangle ABC ,intersects AB and AC at D and E respectively. Prove that (AD)/(DB)=(AE)/(EC) .

In each of the following questions, we ask you to prove a statement. List all the steps in each proof, ang give the reason for each step. 1 . Prove that the sum of two consecutive odd numbers is divisible by 4.

Name two metals which do not correct easily . Give an example in each of the following case to support that : (i) Corrosion of some metals is an advantage. (ii) Corrosion of a metal is a serious problem .

Envied by the popularity of Pythagoras his disciple claimed a different relation between the sides of right angle triangles. By observing this what do you notice?

Find counter - examples to disprove the following statements : If the corresponding angles in two triangles are equal, then the triangles are congruent.