75 points for answwer
given that in isosceles △abc, base bc, be⊥ac, and cf⊥ab, which of the fo...
![subject](/tpl/images/cats/mat.png)
Mathematics, 31.10.2019 18:31 NerdyE
75 points for answwer
given that in isosceles △abc, base bc, be⊥ac, and cf⊥ab, which of the following proves that be≅cf?
. isosc. △abc, base bc (given)
2. ab≅bc (def. of isosc. △)
3. be⊥ac, cf⊥ab (given)
4. ∠bec and ∠cfb are supplementary angles (def. of ⊥)
5. ac≅bc (supp. ∠s ≅ thm.)6. ∠a≅∠b (sym. prop. of≅)7. △abe≅△acf (sas steps 1, 6, 5)8. be≅cf (cpctc)
1. isosc. △abc, base bc (given)
2. ab≅ac (def. of isosc. △)
3. be⊥ac, cf⊥ab (given)
4. m∠bec=m∠cfb=90∘ (def. of ⊥)
5. ∠bec≅∠cfb (rt. ∠s ≅ thm.)
6. ∠a≅∠b (sym. prop. of≅)
7. △abe≅△acf (aas steps 5, 6, 1)
8. be≅cf (cpctc)
1. isosc. △abc, base bc (given)
2. ab≅ac (def. of isosc. △)
3. be⊥ac, cf⊥ab (given)
4. m∠bea=m∠cfa=90∘ (def. of ⊥)
5. ∠bea≅∠cfa (rt. ∠s ≅ thm.)
6. ∠a≅∠a (reflex. prop. of≅)7. △abe≅△acf (aas steps 5, 6, 1)8. be≅cf (cpctc)
1. isosc. △abc, base bc (given)
2. ab≅bc (def. of isosc. △)
3. be⊥ac, cf⊥ab (given)
4. ∠bea and ∠cfa are supplementary angles (def. of ⊥)
5. ab≅bc (supp. ∠s ≅ thm.)
6. ∠a≅∠a (reflex. prop. of≅)
7. △abe≅△acf (sas steps 1, 6, 5)8. be≅cf (cpctc)
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Mathematics
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:50, salazarx062
Which of the following is the graph of y= square root -x-3
Answers: 1
![image](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 22:30, azainababbas
Which statement shows that 6.24 is a rational number? a. 6.24 = 6.242424 b. 6.24 = 6.24 c. 6.24 = 68⁄33 d. 6.24 = 66⁄25
Answers: 1
![image](/tpl/images/cats/mat.png)
![image](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 00:00, dasiaflowers85
The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?
Answers: 1
You know the right answer?
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/en.png)
English, 28.10.2019 17:31
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/himiya.png)
Chemistry, 28.10.2019 17:31
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 28.10.2019 17:31
![Konu](/tpl/images/cats/ekonomika.png)
Business, 28.10.2019 17:31
![Konu](/tpl/images/cats/fizika.png)
![Konu](/tpl/images/cats/obshestvoznanie.png)