Look at the figure. How can you prove ∆ABD and ∆ACD are congruent?

Mathematics

1 answer:

Levart [38]3 years ago

7 0

Answer:

Options (C)

Step-by-step explanation:

For the congruence of the triangles ΔADB and ΔADC,

Statements Reasons

1). AB ≅ AC 1). Given

2). AD ≅ AD 2). Reflexive property

3). ∠BAD ≅ ∠CAD 3). Given

4). ΔABD ≅ ΔCAD 4). SAS postulate

Therefore, Options (C) will be the correct option.

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The track and field coach records Ian's 400-meter race times during three practices. How much greater was the percent of change

BigorU [14]

Answer:

d. 1.5%

Step-by-step explanation:

Given - The track and field coach records Ian's 400-meter race times during three practices.

Practice 1 2 3

Time (s) 63 60 58

To find - How much greater was the percent of change from Practice 1 to Practice 2 than from Practice 2 to Practice 3? Round to the nearest tenth.

a. 7.9%

b. 4.8%

c. 3.3%

d. 1.5%

Proof -

% change from Practice 1 to Practice 2 change = $\frac{60 - 63}{63}. 100$ %