1) How many altitudes can a triangle have? a) 1 b) 2 c) 3 2) A ——— connects a vertex of a triangle to the mid-point of the opposite side. a) Altitude b) Median c) Opposite side 3) An ———- angle of a triangle is equal to the sum of its interior opposite angles. a) Exterior angle b) Interior angle c) Adjacent angle 4) The difference between the lengths of any two sides is ——– than the length of the third side. a) greater than b) less than c) altitude 5) If the Pythagoras property holds, the triangle must be ———— a) right angled b) acute angled c) obtuse angled 6) Find the value of the unknown x in the below figure. a) 80∘ b) 70∘ c) 65∘ d) 50∘ 7) Find the value of x and y in the below figure. a) 70∘, 80∘ b) 50∘, 120∘ c) 60∘, 90∘ d) 40∘, 100∘ 8) The three angles of a triangle are in the ratio 6:3:1. Find all the angles of the triangle. a) 100∘, 80∘, 20∘ b) 108∘, 54∘, 18∘ c) 50∘, 40∘, 10∘ d) None of these 9) Find the value of x and y in the adjoining figure. a) 40∘, 70∘ b) 48∘, 52∘ c) 50∘, 60∘ d) 30∘, 80∘ 10) Which is the longest side of a right angle? a) altitude b) hypotenuse c) legs d) base