Intersection Of A Circle And A Line
Muhtasari
A straight line can slice through a circle at two points, just touch it at one, or miss it entirely. Which of these happens is decided by a single number from the quadratic you get when you combine their equations: the discriminant. This is coordinate geometry meeting the algebra of quadratics in a satisfying way.
In this lesson you will work with the equation of a circle \((x-a)^2+(y-b)^2=r^2\), substitute a line into it, and use the discriminant of the resulting quadratic to decide whether the line is a chord (two points), a tangent (one point) or misses the circle (none). One calculation settles the geometry.
Malengo
- Know and use the equation of a circle with centre (a, b) and radius r.
- Solve problems involving the intersection of a circle and a straight line.
Maelezo ya Somo
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Intersection Of A Circle And A Line. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- The equation of a circle with centre (a, b) and radius r is: A. (x - a)^2 + (y - b)^2 = r B. (x - a)^2 + (y - b)^2 = r^2 C. x^2 + y^2 = r D. (x + a)^2 + (y + b)^2 = r^2 Answer: B
- When a line is substituted into a circle, what does a discriminant of zero mean? A. The line is a chord B. The line is a tangent C. The line misses the circle D. The circle has no centre Answer: B
- For y = x + 1 and x^2 + y^2 = 25, the quadratic in x is x^2 + x - 12 = 0. Its discriminant is: A. -49 B. 1 C. 47 D. 49 Answer: D
- If the discriminant of the combined quadratic is negative, the line: A. Cuts the circle at two points B. Touches the circle C. Misses the circle D. Passes through the centre Answer: C
- A line cuts a circle at two points. The line is called a: A. Tangent B. Radius C. Chord D. Diameter Answer: C
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
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