keyword

lesson 21: correspondence and transformations

Monthly search volume and cost-per-click data for "lesson 21: correspondence and transformations" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=lesson+21:+correspondence+and+transformations&country=us" +--------------+------------------+ | volume | 20 | | cpc | $0 | | competition | 0.01 | | country | US | | updated | 2026-06-23 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
lesson 22 congruence criteria for triangles	30	$0	3/20
lesson 22: congruence criteria for triangles	30	$0	3/20
lesson 23: base angles of isosceles triangles	30	$0	2/20
lesson 24: congruence criteria for triangles	30	$0	2/20
lesson 21 correspondence and transformations	20	$0	15/20
lesson 10 unknown angle proofs proofs with constructions	20	$0	3/20
lesson 10 unknown angle proofs-proofs with constructions	20	$0	3/20
lesson 11 unknown angle proofs	20	$0	3/20
lesson 11: unknown angle proofs	20	$0	3/20
lesson 9 unknown angle proofs--writing proofs	20	$0	2/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=lesson+21:+correspondence+and+transformations&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt