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what- choose the property of equality that justifies the step. prove: if z- 1= 5x+ 1 and x= 2y, then z +10y +2?
addition
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what- choose the property of equality that justifies the step. prove: if z= 4+ x/6, y=2 and z= y, then x=-12?
substitution
what- chose the property of equality that justifies the step. prove: if 10x +5= 2x-11, then x=-2?
division
How to prove an isosceles triangle with one angle bisector?
What have we got to prove? Whether we have to prove a triangle as an Isoseles triangle or prove a property of an isoseles triangle. Hey, do u go to ALHS, i had that same problem on my test today. Greenehornet15@yahoo.com
How do you prove that x equals x?
By the reflexive property of equality, a number is equal to itself: a = a. For example, 2 = 2, 3 = 3, -3/4 = -3/4 etc. Since x is a variable that represent numbers, then x is equal to itself: x = x. Suppose that x = x is a false statement. If x = 1, by the substitution property of equality, 1 can replace x. So we have 1 = 1 which is a true satement. Therefore, x = x cannot be a false statement. Thus, x = x is true. If: x = x Then: x-x = 0
Is it possible to prove one pair of triangles congruent and then use their congruent corresponding parts to prove another pair congruent?
If I understand the question correctly, the answer is yes. Thanks to the transitive property of congruence.
