prove: δabc is an isosceles triangle.
Mathematics, 31.01.2020 06:47 mswillm
Given: base ∠bac and ∠acb are congruent.
prove: δabc is an isosceles triangle.
when completed (fill in the blanks), the following paragraph proves that line segment ab is congruent to line segment bc making δabc an isosceles triangle.
construct a perpendicular bisector from point b to line segment ac.
label the point of intersection between this perpendicular bisector and line segment ac as point d.
m∠bda and m∠bdc is 90° by the definition of a perpendicular bisector.
∠bda is congruent to ∠bdc by the definition of congruent angles.
line segment ad is congruent to line segment dc by by the definition of a perpendicular bisector.
δbad is congruent to δbcd by the
line segment ab is congruent to line segment bc because
consequently, δabc is isosceles by definition of an isosceles triangle.
corresponding parts of congruent triangles are congruent (cpctc)
the definition of a perpendicular bisector
the definition of a perpendicular bisector
the definition of congruent angles
the definition of congruent angles
the definition of a perpendicular bisector
angle-side-angle (asa) postulate
corresponding parts of congruent triangles are congruent (cpctc)
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Given: base ∠bac and ∠acb are congruent.
prove: δabc is an isosceles triangle.
prove: δabc is an isosceles triangle.
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