Pls help me 1.- El 25% de 400 ÷ 10 X 9 el 50% =

2.- El 20% de 400 X 6 el 10% el 50% =

3.- El 50% de 1000 el 20% ÷ 10 el 10% =

4.- 90 X 6 el 10% el 50% ÷ 9 al³ =

5.- El 75% de 40 EL 10% al³ - 7 EL 25% =

6.- 12 X 12 EL 25% ÷ 6 X 20 el 10% =

7.- 15 x 15 – 25 el 20% el 50% ÷ 20 =

8.- 2 al³ X 40 + 320 + 60 ÷ 100 =

9.- 10 al² X 9 ÷ 3 el 20% ÷ 12 =

10.- 3 X 7 + 21 ÷ 3 ÷ 7 al cubo =

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc