geometry

posted by .

Given: In triangle ABC, <A=135 degree
Prove: <B is not equal to 45 degree ( Write an indirect proof)

  • geometry -

    The angles add up to 180. If angle B is 45, then that leaves angle C = 0. Not much of a triangle.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Geometry- how to write proof

    ABC is a right triangle. Angle C is 90 degree. Altitude CD is drawn to hypotenuse AB. Prove AB/BC = BC/BD and AB/AC = AC/AD This is a theorem. How do I prove it?
  2. Geometry

    Writing indirect proofs. Can someone please check for me. I am not sure If this is correct.Thanks much Given: triangle ABC angle B=120 degree Proof: Triangle A does not equal 60 degree Plan: Using an indirect proof, using the paragraph …
  3. Geometry

    Given: in triangle ABC, angle B= 120 degrees Prove: angle A does not= 60 degrees Plan: use indirect proof Assume temporarily that Measure angle A = 60. Then measure angle C=60, and measure angles A+B+C=180= 60+B+60=180. Therefore the …
  4. Geometry

    The shape is a triangle with a line in the middle. How do I write an indirect proof with this information?
  5. geometry

    Indirect proof given triangle ABC,<B is an obtuse angle prove there can only be one obtuse angle in triangle.
  6. Geometry

    Write an indirect proof. Given:n^2 is even Prove: n^2 is divisible by 4.
  7. Math

    the graph line passing through (1,1) , (-2,4) make with positive x-axis angle equal is: a) 30 degree b) 45 degree c) 60 degree d) 135 degree
  8. geometry

    The medial triangle of a triangle ABC is the triangle whose vertices are located at the midpoints of the sides AB, AC, and BC of triangle ABC. From an arbitrary point O that is not a vertex of triangle ABC, you may take it as a given …
  9. geometry

    Constuct a triangle ABC ,given that angleA is 70 degree & angle C is 35 degree and length of perpendicular from A on BC is 5cm .meausre BC
  10. Geometry

    Given: ∠ABC and ∠CBD are supplementary angles. m∠ABC = 4x + 7, m∠CBD = 2x − 1. Prove: m∠ABC = 123 How do I write this in a two column proof?

More Similar Questions