10) If ZABD and ZACD are both right angles and CD = 15 and BD = 4z – 9, what is the value of z? B D A 5 В 6 10 D 12 E) 15

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter10: Analytic Geometry
Section10.4: Analytic Proofs
Problem 19E: Use the analytic method to decide what type of triangle is formed when the midpoints of the sides of...
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**Question:**

10) If ∠ABD and ∠ACD are both right angles and CD = 15 and BD = 4x - 9, what is the value of x?

**Diagram:**
The diagram features a circle with center \(A\). Points \(B\) and \(C\) lie on the circumference of the circle such that line segments \(AB\) and \(AC\) are radii of the circle. Point \(D\) is outside the circle, forming right angles ∠ABD and ∠ACD with the line segments \(BD\) and \(CD\), respectively. A tangent line from \(B\) to \(D\) and the segment \(CD\) is drawn.

**Given:**
- ∠ABD and ∠ACD are right angles.
- CD = 15
- BD = 4x - 9

**Possible answers:**
A) 5
B) 6
C) 10
D) 12
E) 15
Transcribed Image Text:**Question:** 10) If ∠ABD and ∠ACD are both right angles and CD = 15 and BD = 4x - 9, what is the value of x? **Diagram:** The diagram features a circle with center \(A\). Points \(B\) and \(C\) lie on the circumference of the circle such that line segments \(AB\) and \(AC\) are radii of the circle. Point \(D\) is outside the circle, forming right angles ∠ABD and ∠ACD with the line segments \(BD\) and \(CD\), respectively. A tangent line from \(B\) to \(D\) and the segment \(CD\) is drawn. **Given:** - ∠ABD and ∠ACD are right angles. - CD = 15 - BD = 4x - 9 **Possible answers:** A) 5 B) 6 C) 10 D) 12 E) 15
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