#### • Class 11 Physics Demo

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# definition of congruent circles

Question:and what are some real life example of a congruent angle?

Answers:Congruent angles are angles with the exact amount of degrees for instance.. 2 angles that are 90 degrees are congruent angles. Another example is 2 angles that are exactly 23 degrees..these angles are congruent. Real life example: Most buildings stand 90 degrees with the ground.

Question:are tangent, what is the measure of the radius of one of them? A 3 B 5 C 7 D 8 E 10 Explain your answer.

Answers:Think about it for a second. If the two circles are tangent to each other and are congurent, the radius must be half of the distance between their centers. Let's figure out this distance. [ (x_2 - x_1)^2 + (y_2 - y_1)^2 ] = { [6 - (-2)]^2 + (9 - 3)^2 ] = ( 8^2 + 6^2 ) = 100 = 10 Therefore, the radius would be 10/2 = 5 and the answer is B. Hope this helps!

Question:what about if all the sides of the triangles are congruent to another one, are the triangles congruent?

Answers:if all the corresponding angles of 2 triangles are congruent, then they are definitely similar triangles, not necessarily congruent, as an infinite number of triangles with the same angles exist. On the other hand, if 3 sides are congruent, then the 2 triangles are congruent.

Question:The word 'circle' is used in the Bible with respect to the earth and is thought to prove the earth is a sphere. Isn't it false to say that if something is a circle it must necessarily be a sphere? Isn't it more likely that the word 'circle' is just the same as it means in the Sumarian myth of the flat earth? THX-1138 - the first and best film of George Lucas.

Answers:Did they really differentiate that much back than? Did they have mathematics to the point of complex geometric shapes? Now its different but I don't know about back then. Did you name your avatar after some '70s B-movie? I can't believe somebody else actually saw that movie.