Triangles
Uttarakhand Board · Class 10 · Mathematics
Flashcards for Triangles — Uttarakhand Board Class 10 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
What are similar figures? Give an example.
Answer
Similar figures are figures that have the same shape but not necessarily the same size. Examples: All circles are similar to each other, all squares are similar to each other, all equilateral triangle
What is the relationship between congruent and similar figures?
Answer
All congruent figures are similar, but similar figures need not be congruent. Congruent figures have both the same shape and same size, while similar figures only need to have the same shape. Congruen
State the conditions for two polygons to be similar.
Answer
Two polygons of the same number of sides are similar if: (i) their corresponding angles are equal, and (ii) their corresponding sides are in the same ratio (proportion). Both conditions must be satisf
What is the scale factor in similar figures?
Answer
The scale factor (or Representative Fraction) is the constant ratio in which corresponding sides of similar figures are related. If two similar figures have corresponding sides in the ratio a:b, then
State the Basic Proportionality Theorem (Thales Theorem).
Answer
If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, then the other two sides are divided in the same ratio. In triangle ABC, if DE || BC, then AD
State the converse of the Basic Proportionality Theorem.
Answer
If a line divides any two sides of a triangle in the same ratio, then the line is parallel to the third side. In triangle ABC, if AD/DB = AE/EC, then DE || BC.
What are the conditions for two triangles to be similar?
Answer
Two triangles are similar if: (i) their corresponding angles are equal, and (ii) their corresponding sides are in the same ratio (proportion). When triangles are similar, we write △ABC ~ △DEF, where ~
What are equiangular triangles?
Answer
Equiangular triangles are triangles whose corresponding angles are equal. According to Thales' theorem, the ratio of any two corresponding sides in two equiangular triangles is always the same, which
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