1) D and E are the midpoints of side AB and AC of a triangle ABC, respectively and BC = 6 CM . If DE parallel BC then the length (in centimetre)of DE in: a) 2.5 b) 3 c) 5 d) 6 2) Which of the following triangle have the same side lengths? a) Scalene b) Isosceles c) Equilateral d) None of these 3) Area of an equilateral triangle with side length a is equal to a) (√3/2)a b) (√3/2)a2 c) (√3/4)a2 d) (√3/4)a 4) The diagonals of a rhombus are session cm and 12 CM in length the side of the Rhombus in length is a) 20cm b) 8cm c) 9cm d) 10cm 5) If a perimeter of a triangle is 100 cm and the length of two sides are 30 cm and 40 cm the length of third side will be a) 60cm b) 40cm c) 50cm d) 30cm 6) If a triangle ABC and D E F are similar and AB equal to 4 cm De equal to 6 CM if equal to 9 cm and FD equal to 12 cm the perimeter of a triangle ABC is a) 18cm b) 21cm c) 20cm d) 22cm 7) The height of an equilateral triangle of side 5 cm is a) 4.33cm b) 3.9cm c) 3cm d) 8cm 8) If ABC and DEF are two Triangles and AB/DE equal to BC/FD then the two triangle are similar if a) Angle A = Angle F b) Angle B= Angle D c) Angle A= Angle D d) Angle B= Angle E 9) Sites of two similar triangles are in the ratio 4 ratio 9 areas of these Triangles are in the ratio a) 2:3 b) 4:9 c) 81:16 d) 16:81 10) Which of the following are not similar figures a) Circles b) Squares c) Equilateral triangles d) Isosceles triangles

CLASS 10TH CH 6 TRIANGLES

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