Maths Congruence of Triangles part 2 (Congruence of Plane figures) CBSE Class 7 Mathematics VII

TL;DR

Learn about the concept of congruence in plain figures, including dos and don'ts for determining congruence.

Transcript

Hello friends this video on congruence of triangles part two is brought to you by exam fear.com no more fear from exam so let us look at congruence of some plain figures that is the figures which can be drawn on a plane that is all those figures which you can draw on a piece of paper they are all examples of plain figures so what do you see on the ... Read More

Key Insights

• ✈️ Plain figures can be drawn on a plane, such as a piece of paper.
• 💠 Congruence in figures means they are identical in shape and size.
• 👻 Rotation is allowed when determining congruence, as long as it does not alter the shape or size.
• 👻 Twisting, stretching, and bending are not allowed when determining congruence.
• 💠 Different shapes or sizes indicate that figures are not congruent.
• 💁 The tips and edges of figures should be compared to determine congruence.
• 💠 Two figures can be congruent if they have the same shape and size.

Questions & Answers

Q: What is the definition of congruence in plain figures?

Congruence in plain figures means that two figures are identical in shape and size.

Q: What are the dos for determining congruence between two figures?

The dos for determining congruence include rotation, where the figure can be rotated without altering its shape or size.

Q: What are the don'ts for determining congruence between two figures?

The don'ts for determining congruence include twisting, stretching, and bending, as these actions alter the shape or size of the figures.

Q: How can we determine congruence between two figures?

To determine congruence, we can try rotating the figure without altering its shape or size. If the figures overlap, they are congruent.

Summary & Key Takeaways

• The video discusses the concept of congruence in plain figures and how to determine whether two figures are congruent.

• Dos for determining congruence include rotation, which does not alter the shape or size of the figures.

• Don'ts for determining congruence include twisting, stretching, and bending, as these alter the shape or size of the figures.