Mathematics
Name the following triangles with regards to sides:

Triangles
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Answer
(i) In triangle ABC, AB = 5 cm, BC = 4 cm and AC = 5 cm.
Since two sides (AB and AC) are equal,
∴ Triangle ABC is an isosceles triangle.
(ii) In triangle PQR, PQ = 4 cm, QR = 3 cm and RP = 5 cm.
Since all three sides are different in length,
∴ Triangle PQR is a scalene triangle.
(iii) In triangle XYZ, XY = 4.5 cm, YZ = 4.5 cm and XZ = 4.5 cm.
Since all three sides are equal in length,
∴ Triangle XYZ is an equilateral triangle.
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Related Questions
Which of the following are models for perpendicular lines?
(i) The adjacent edges of a postcard.
(ii) The line segment forming the letter 'L'.
(iii) The adjacent edges of your Math book.
(iv) The line segments forming the letter 'V'.
In the figure given below, line l is perpendicular to line m.

(a) Is CE = EG?
(b) Does bisect segment ?
(c) Identify any two line segments for which is the perpendicular bisector.
(d) Are these true?
(i) AC > FG
(ii) CD = GH
(iii) BC < EG
Name the following triangles with regards to angles:

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

