In the right triangle shown, the hypotenuse has length 52 and one leg has length 20. What is the length of the other leg?
A48
B46
C45
D44
Explanation
By the Pythagorean theorem: b² = c² − a² = 52² − 20² = 2704 − 400 = 2304. So b = √2304 = 48.
Question 7 of 10
TEKS ADVMedium Diagram
The function f(x) = (x + 3)² − 1 is graphed in the xy-plane as shown. What is the vertex of this parabola?
A(-3, 1)
B(3, 1)
C(3, -1)
D(-3, -1)
Explanation
In vertex form a(x − h)² + k, the vertex is at (h, k). Here h = -3 and k = -1, so the vertex is (-3, -1). The parabola opens upward.
Question 8 of 10
TEKS GEOEasy Diagram
The circle shown has a radius of 11. What is the area of the circle, in terms of π?
A22π
B242π
C121π
D11π
Explanation
Area = πr² = π(11)² = 121π. (Don't confuse with circumference 2πr.)
Question 9 of 10
TEKS ALGEasy
Solve for x: 7x + 10 = 94
A16
B7
C8
D12
Explanation
Subtract 10 from both sides: 7x = 84. Then divide both sides by 7: x = 12.
Question 10 of 10
TEKS GEOMedium Diagram
Triangle ABC is similar to triangle DEF, shown below. Side AB has length 8 and corresponds to side DE of length 40. If side BC has length 7, what is the length of side EF?
A42
B15
C12
D35
Explanation
Similar triangles have proportional sides. Scale factor = DE/AB = 40/8 = 5. So EF = BC × 5 = 7 × 5 = 35.
Score
Correct
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