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

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

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

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 .

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.

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.

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) .

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.

The following fractins represent just three different nuimbers. Separate them into three groups of equivalent fractions, by changing each one to its simplest form. (f) 15/75

Name the types of following triangles:(f) ∆LMN with m∠L = 30⁰, m∠M = 70⁰ and m∠N = 80⁰