The cross-product rule states that if ab =cd , then:Multiple choice question.𝑎×𝑏=𝑐×𝑑𝑎×𝑑=𝑏×𝑐𝑎×𝑐=𝑏×𝑑𝑎×𝑑=𝑑×𝑐

If in ∆ ABC and ∆ PQR, ஺஻ொோ = ஻஼௉ோ = ஼஺௉ொ then:a) ∆PQR ~∆CAB b) ∆PQR ~∆ABC c) ∆CBA ~∆PQR d) ∆BCA ~∆PQR

Which of the following is wrong?Question 40Select one:a.If A → BC, then A → B and B → Cb.If A → B and B → C, then A → Cc.If A → B and A → C, then A → BCd.If A → B and C is another attribute, then AC → BC

If ABCD is a trapezium in which AB || CD and AD = BC, then:a. ∠A = ∠Bb. ∠A > ∠Bc. ∠A < ∠Bd. None of the above

The dot product a⋅b𝑎⋅𝑏 is zero when (choose one or more)Question 2Select one or more:a.a𝑎 is zerob.a𝑎 and b𝑏 are perpendicularc.b𝑏 is zerod.none of the otherse.a𝑎 and b𝑏 are parallel

W = ((AB)’ + CD)’ + (ACD’)’