One triangle has sides 5, 7, 9 cm. Another has sides 9, 5, 7 cm. Are they congruent?
ANo, as the order differs
BOnly similar, not equal
CCannot be said yet
DYes, by the SSS rule
Answer & Solution
Correct answer: D. Yes, by the SSS rule
Both triangles have the same three side lengths, so they are congruent by SSS whatever the order of listing.
Keep practising Triangles and congruence of triangles
Browse all Triangles and congruence of triangles questions for Olympiad (Class 7), or explore more Mathematics topics.
Related questions
In which ancient work were the names for classifying triangles defined?The yield road sign has the shape of which triangle?Two triangles each have angles 40° and 60°, and the side opposite 40° is 8 cm in both. WhiTwo triangles each have sides 6 cm and 8 cm and a 30° angle not between them. Are they conIn triangle ABC, AB = AC and D is the midpoint of BC. Triangles ABD and ACD are congruent Interior angles are in the ratio 1:2:3. What is the exterior angle at the smallest angle?An exterior angle of a triangle is 100° and the two far interior angles are equal. Find eaThree points lie on one straight line. How many proper triangles do they determine?