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Mathematics, 17.04.2020 18:47 kennyduong04
Umur purata Hao Sheng, ayah dan datuknya ialah 53 tahun. Setengah daripada umur datuknya, tambah dengan satu pertiga daripada umur ayahnya dan satu perempat daripada umur Hao Sheng ialah 65 tahun. Sekiranya pada 4 tahun yang lalu, umur datuknya ialah empat kali ganda umur Hao Sheng, berapakah umyr setiap orang sekarang?
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Mathematics, 21.06.2019 21:30
In δabc shown below, ∠bac is congruent to ∠bca: triangle abc, where angles a and c are congruent 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. (4 points) 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. 1. corresponding parts of congruent triangles are congruent (cpctc) 2. the definition of a perpendicular bisector 1. the definition of a perpendicular bisector 2. the definition of congruent angles 1. the definition of congruent angles 2. the definition of a perpendicular bisector 1. angle-side-angle (asa) postulate 2. corresponding parts of congruent triangles are congruent (cpctc)
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Umur purata Hao Sheng, ayah dan datuknya ialah 53 tahun. Setengah daripada umur datuknya, tambah den...
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